[{"publication_identifier":{"issn":["2304-6732"]},"publication_status":"published","intvolume":"        13","citation":{"chicago":"Metzner, Dominik, Jens Potthoff, Thomas Zentgraf, and Jens Förstner. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” <i>Photonics</i> 13, no. 2 (2026). <a href=\"https://doi.org/10.3390/photonics13020128\">https://doi.org/10.3390/photonics13020128</a>.","ieee":"D. Metzner, J. Potthoff, T. Zentgraf, and J. Förstner, “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations,” <i>Photonics</i>, vol. 13, no. 2, Art. no. 128, 2026, doi: <a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>.","ama":"Metzner D, Potthoff J, Zentgraf T, Förstner J. Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. <i>Photonics</i>. 2026;13(2). doi:<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>","apa":"Metzner, D., Potthoff, J., Zentgraf, T., &#38; Förstner, J. (2026). Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. <i>Photonics</i>, <i>13</i>(2), Article 128. <a href=\"https://doi.org/10.3390/photonics13020128\">https://doi.org/10.3390/photonics13020128</a>","short":"D. Metzner, J. Potthoff, T. Zentgraf, J. Förstner, Photonics 13 (2026).","mla":"Metzner, Dominik, et al. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” <i>Photonics</i>, vol. 13, no. 2, 128, MDPI AG, 2026, doi:<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>.","bibtex":"@article{Metzner_Potthoff_Zentgraf_Förstner_2026, title={Approximating Incoherent Monochromatic Light Sources in FDTD Simulations}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>}, number={2128}, journal={Photonics}, publisher={MDPI AG}, author={Metzner, Dominik and Potthoff, Jens and Zentgraf, Thomas and Förstner, Jens}, year={2026} }"},"date_updated":"2026-02-02T21:38:34Z","oa":"1","volume":13,"author":[{"last_name":"Metzner","full_name":"Metzner, Dominik","first_name":"Dominik"},{"full_name":"Potthoff, Jens","last_name":"Potthoff","first_name":"Jens"},{"first_name":"Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","id":"30525","full_name":"Zentgraf, Thomas"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"doi":"10.3390/photonics13020128","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2304-6732/13/2/128"}],"type":"journal_article","status":"public","_id":"63827","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"61"}],"user_id":"158","article_number":"128","article_type":"original","quality_controlled":"1","issue":"2","year":"2026","publisher":"MDPI AG","date_created":"2026-02-02T07:18:03Z","title":"Approximating Incoherent Monochromatic Light Sources in FDTD Simulations","publication":"Photonics","abstract":[{"lang":"eng","text":"Light-emitting diodes (LEDs) are becoming increasingly important across various sectors of the lighting industry and are being used more frequently. In the field of symbolic projection, research is increasingly focusing on implementing light modulation using energy-efficient, incoherent LEDs rather than lasers. Since light modulation in micro- and nano-optics is typically achieved through phase modulation, Finite-Difference Time-Domain (FDTD) simulations are employed for analysis. The objective of this article is to investigate different approaches for approximating incoherent monochromatic light sources within FDTD simulations. To this end, two approaches based on dipole sources are considered, as well as a method involving plane waves with modulated wavefronts based on Cosine–Fourier functions and a method based on the superposition of Gaussian beams. These methods are evaluated in terms of their accuracy using a two-dimensional double-slit configuration and are compared against a fully incoherent analytical reference."}],"keyword":["tet_topic_opticalantenna","tet_topic_numerics","tet_topic_meta"],"language":[{"iso":"eng"}]},{"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_id":"63533","access_level":"closed","file_name":"2026-01 Jeong-Hui-Kim - JACS - Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing (with Purdue).pdf","file_size":5453427,"date_created":"2026-01-08T20:51:12Z","creator":"fossie","date_updated":"2026-01-08T20:51:12Z"}],"abstract":[{"lang":"eng","text":"Room-temperature lasing is a key milestone in the development of miniaturized optoelectronic and photonic devices. We present a simple approach to synthesize phase-pure quasi-2D layered tin perovskite nanowires with varying quantum well thicknesses (n = 1 to 4). By incorporating a new organic spacer capable of forming a hydrogen-bonded organic framework, this method promoted anisotropic crystal growth and enhanced lattice rigidity. Furthermore, introducing molecular intercalants enabled controlled crystallization into well-defined nanowires that function as Fabry–Pérot cavities. Cavities made from n = 2 to 4 perovskites support efficient and robust near-infrared, room-temperature optically pumped lasing with the threshold as low as 75.8 μJ/cm2, cavity quality factor over 3000, and negligible degradation over 106 pulses. A cleaved coupled nanolaser was fabricated as a proof-of-concept device for photonic applications."}],"publication":"Journal of the American Chemical Society","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_opticalantenna"],"year":"2026","title":"Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing","date_created":"2026-01-08T20:48:26Z","publisher":"American Chemical Society (ACS)","status":"public","type":"journal_article","file_date_updated":"2026-01-08T20:51:12Z","article_type":"original","user_id":"158","department":[{"_id":"61"},{"_id":"623"}],"_id":"63532","citation":{"apa":"Kim, J. H., Simon, J., Shao, W., Nian, Z., Yang, H., Chen, P., Triplett, B., Li, Z., Wu, P., Chen, Y., Farheen, H., Pagadala, K., Choi, K. R., Fruhling, C. B., Förstner, J., Boltasseva, A., Savoie, B. M., Shalaev, V. M., &#38; Dou, L. (2026). Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing. <i>Journal of the American Chemical Society</i>, jacs.5c14431. <a href=\"https://doi.org/10.1021/jacs.5c14431\">https://doi.org/10.1021/jacs.5c14431</a>","short":"J.H. Kim, J. Simon, W. Shao, Z. Nian, H. Yang, P. Chen, B. Triplett, Z. Li, P. Wu, Y. Chen, H. Farheen, K. Pagadala, K.R. Choi, C.B. Fruhling, J. Förstner, A. Boltasseva, B.M. Savoie, V.M. Shalaev, L. Dou, Journal of the American Chemical Society (2026) jacs.5c14431.","bibtex":"@article{Kim_Simon_Shao_Nian_Yang_Chen_Triplett_Li_Wu_Chen_et al._2026, title={Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing}, DOI={<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Kim, Jeong Hui and Simon, Jeffrey and Shao, Wenhao and Nian, Zhichen and Yang, Hanjun and Chen, Peigang and Triplett, Brandon and Li, Zhixu and Wu, Pengfei and Chen, Yuheng and et al.}, year={2026}, pages={jacs.5c14431} }","mla":"Kim, Jeong Hui, et al. “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” <i>Journal of the American Chemical Society</i>, American Chemical Society (ACS), 2026, p. jacs.5c14431, doi:<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>.","chicago":"Kim, Jeong Hui, Jeffrey Simon, Wenhao Shao, Zhichen Nian, Hanjun Yang, Peigang Chen, Brandon Triplett, et al. “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” <i>Journal of the American Chemical Society</i>, 2026, jacs.5c14431. <a href=\"https://doi.org/10.1021/jacs.5c14431\">https://doi.org/10.1021/jacs.5c14431</a>.","ieee":"J. H. Kim <i>et al.</i>, “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing,” <i>Journal of the American Chemical Society</i>, p. jacs.5c14431, 2026, doi: <a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>.","ama":"Kim JH, Simon J, Shao W, et al. Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing. <i>Journal of the American Chemical Society</i>. Published online 2026:jacs.5c14431. doi:<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>"},"page":"jacs.5c14431","publication_status":"published","publication_identifier":{"issn":["0002-7863","1520-5126"]},"has_accepted_license":"1","doi":"10.1021/jacs.5c14431","author":[{"last_name":"Kim","full_name":"Kim, Jeong Hui","first_name":"Jeong Hui"},{"full_name":"Simon, Jeffrey","last_name":"Simon","first_name":"Jeffrey"},{"first_name":"Wenhao","full_name":"Shao, Wenhao","last_name":"Shao"},{"full_name":"Nian, Zhichen","last_name":"Nian","first_name":"Zhichen"},{"last_name":"Yang","full_name":"Yang, Hanjun","first_name":"Hanjun"},{"first_name":"Peigang","last_name":"Chen","full_name":"Chen, Peigang"},{"full_name":"Triplett, Brandon","last_name":"Triplett","first_name":"Brandon"},{"first_name":"Zhixu","full_name":"Li, Zhixu","last_name":"Li"},{"first_name":"Pengfei","full_name":"Wu, Pengfei","last_name":"Wu"},{"first_name":"Yuheng","full_name":"Chen, Yuheng","last_name":"Chen"},{"full_name":"Farheen, Henna","id":"53444","orcid":"0000-0001-7730-3489","last_name":"Farheen","first_name":"Henna"},{"last_name":"Pagadala","full_name":"Pagadala, Karthik","first_name":"Karthik"},{"full_name":"Choi, Kyu Ri","last_name":"Choi","first_name":"Kyu Ri"},{"first_name":"Colton B.","last_name":"Fruhling","full_name":"Fruhling, Colton B."},{"full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"},{"first_name":"Alexandra","full_name":"Boltasseva, Alexandra","last_name":"Boltasseva"},{"last_name":"Savoie","full_name":"Savoie, Brett M.","first_name":"Brett M."},{"first_name":"Vladimir M.","full_name":"Shalaev, Vladimir M.","last_name":"Shalaev"},{"first_name":"Letian","last_name":"Dou","full_name":"Dou, Letian"}],"date_updated":"2026-01-08T20:54:59Z"},{"year":"2026","citation":{"ama":"Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>arXiv</i>. Published online 2026. doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>","chicago":"Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner, and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>.","ieee":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova, “Gain-induced spectral non-degeneracy in type-II parametric down-conversion,” <i>arXiv</i>, 2026, doi: <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","apa":"Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., &#38; Sharapova, P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>ArXiv</i>. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>","mla":"Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026, doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","bibtex":"@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced spectral non-degeneracy in type-II parametric down-conversion}, DOI={<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>}, journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }","short":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova, ArXiv (2026)."},"title":"Gain-induced spectral non-degeneracy in type-II parametric down-conversion","doi":"10.48550/ARXIV.2603.01656","date_updated":"2026-03-10T15:41:18Z","author":[{"first_name":"Behnood","last_name":"Taheri","full_name":"Taheri, Behnood"},{"id":"98502","full_name":"Kopylov, Denis","last_name":"Kopylov","first_name":"Denis"},{"first_name":"Manfred","full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"orcid":"0000-0001-8864-2072","last_name":"Meier","id":"344","full_name":"Meier, Torsten","first_name":"Torsten"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"},{"id":"60286","full_name":"Sharapova, Polina R.","last_name":"Sharapova","first_name":"Polina R."}],"date_created":"2026-03-10T15:37:22Z","status":"public","type":"journal_article","publication":"arXiv","language":[{"iso":"eng"}],"project":[{"_id":"168","name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"}],"_id":"64877","user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"34"},{"_id":"61"},{"_id":"230"},{"_id":"623"},{"_id":"429"}]},{"citation":{"mla":"Brauckmann, Michael, et al. “Enhancement Of Light-Matter Interaction In Topological Waveguides And Resonators.” <i>Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics</i>, 2025.","short":"M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner, T. Zentgraf, in: Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics, 2025.","bibtex":"@inproceedings{Brauckmann_Narvaez Castaneda_Siebert_Brecht_Förstner_Zentgraf_2025, title={Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators}, booktitle={Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics}, author={Brauckmann, Michael and Narvaez Castaneda, Emmanuel and Siebert, Dustin and Brecht, Benjamin and Förstner, Jens and Zentgraf, Thomas}, year={2025} }","apa":"Brauckmann, M., Narvaez Castaneda, E., Siebert, D., Brecht, B., Förstner, J., &#38; Zentgraf, T. (2025). Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators. <i>Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics</i>. META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain.","chicago":"Brauckmann, Michael, Emmanuel Narvaez Castaneda, Dustin Siebert, Benjamin Brecht, Jens Förstner, and Thomas Zentgraf. “Enhancement Of Light-Matter Interaction In Topological Waveguides And Resonators.” In <i>Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics</i>, 2025.","ieee":"M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner, and T. Zentgraf, “Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators,” presented at the META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain, 2025.","ama":"Brauckmann M, Narvaez Castaneda E, Siebert D, Brecht B, Förstner J, Zentgraf T. Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators. In: <i>Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics</i>. ; 2025."},"year":"2025","author":[{"first_name":"Michael","last_name":"Brauckmann","full_name":"Brauckmann, Michael"},{"full_name":"Narvaez Castaneda, Emmanuel","last_name":"Narvaez Castaneda","first_name":"Emmanuel"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"first_name":"Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","id":"30525","full_name":"Zentgraf, Thomas"}],"date_created":"2025-05-23T06:10:53Z","date_updated":"2025-05-23T06:11:20Z","conference":{"name":"META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics","start_date":"2025-07-22","end_date":"2025-07-25","location":"Malaga, Spain"},"title":"Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators","publication":"Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics","type":"conference","status":"public","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"user_id":"30525","_id":"60022","project":[{"name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53","grant_number":"231447078"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"grant_number":"231447078","name":"TRR 142 - A09: TRR 142 - Erzeugung von Drei-Photonen-Zuständen mit On-Chip Pumplichtunterdrückung in topologischen Wellenleitern (A09*)","_id":"164"}],"language":[{"iso":"eng"}]},{"page":"126–129","citation":{"apa":"Spieker, C., Förstner, J., Hölscher, J., Claes, L., &#38; Henning, B. (2025). Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method. <i>2025 International Congress on Ultrasonics</i>, 126–129. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">https://doi.org/10.5162/ultrasonic2025/a18-a1</a>","bibtex":"@inproceedings{Spieker_Förstner_Hölscher_Claes_Henning_2025, place={Paderborn}, title={Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method}, DOI={<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">10.5162/ultrasonic2025/a18-a1</a>}, booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service GmbH}, author={Spieker, Carsten and Förstner, Jens and Hölscher, Jonas and Claes, Leander and Henning, Bernd}, year={2025}, pages={126–129} }","short":"C. Spieker, J. Förstner, J. Hölscher, L. Claes, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 126–129.","mla":"Spieker, Carsten, et al. “Modeling and Simulation of the Behavior of Piezoceramics with the Discontinuous Galerkin Method.” <i>2025 International Congress on Ultrasonics</i>, AMA Service GmbH, 2025, pp. 126–129, doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">10.5162/ultrasonic2025/a18-a1</a>.","ama":"Spieker C, Förstner J, Hölscher J, Claes L, Henning B. Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method. In: <i>2025 International Congress on Ultrasonics</i>. AMA Service GmbH; 2025:126–129. doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">10.5162/ultrasonic2025/a18-a1</a>","ieee":"C. Spieker, J. Förstner, J. Hölscher, L. Claes, and B. Henning, “Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method,” in <i>2025 International Congress on Ultrasonics</i>, 2025, pp. 126–129, doi: <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">10.5162/ultrasonic2025/a18-a1</a>.","chicago":"Spieker, Carsten, Jens Förstner, Jonas Hölscher, Leander Claes, and Bernd Henning. “Modeling and Simulation of the Behavior of Piezoceramics with the Discontinuous Galerkin Method.” In <i>2025 International Congress on Ultrasonics</i>, 126–129. Paderborn: AMA Service GmbH, 2025. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a1\">https://doi.org/10.5162/ultrasonic2025/a18-a1</a>."},"year":"2025","place":"Paderborn","doi":"10.5162/ultrasonic2025/a18-a1","title":"Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method","date_created":"2025-11-25T12:23:05Z","author":[{"last_name":"Spieker","id":"67587","full_name":"Spieker, Carsten","first_name":"Carsten"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862"},{"first_name":"Jonas","last_name":"Hölscher","full_name":"Hölscher, Jonas","id":"73952"},{"id":"11829","full_name":"Claes, Leander","orcid":"0000-0002-4393-268X","last_name":"Claes","first_name":"Leander"},{"first_name":"Bernd","full_name":"Henning, Bernd","id":"213","last_name":"Henning"}],"publisher":"AMA Service GmbH","date_updated":"2026-01-13T13:00:25Z","status":"public","publication":"2025 International Congress on Ultrasonics","type":"conference","language":[{"iso":"eng"}],"department":[{"_id":"49"},{"_id":"61"}],"user_id":"11829","_id":"62296","project":[{"name":"FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)","_id":"245"}]},{"place":"Paderborn","year":"2025","citation":{"short":"J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 130–133.","mla":"Hölscher, Jonas, et al. “Multiscale Thermo-Piezoelectric Simulations Using the Finite Element Method.” <i>2025 International Congress on Ultrasonics</i>, AMA Service GmbH, 2025, pp. 130–133, doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">10.5162/ultrasonic2025/a18-a2</a>.","bibtex":"@inproceedings{Hölscher_Friesen_Claes_Spieker_Förstner_Henning_2025, place={Paderborn}, title={Multiscale thermo-piezoelectric simulations using the finite element method}, DOI={<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">10.5162/ultrasonic2025/a18-a2</a>}, booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service GmbH}, author={Hölscher, Jonas and Friesen, Olga and Claes, Leander and Spieker, Carsten and Förstner, Jens and Henning, Bernd}, year={2025}, pages={130–133} }","apa":"Hölscher, J., Friesen, O., Claes, L., Spieker, C., Förstner, J., &#38; Henning, B. (2025). Multiscale thermo-piezoelectric simulations using the finite element method. <i>2025 International Congress on Ultrasonics</i>, 130–133. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">https://doi.org/10.5162/ultrasonic2025/a18-a2</a>","ieee":"J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, and B. Henning, “Multiscale thermo-piezoelectric simulations using the finite element method,” in <i>2025 International Congress on Ultrasonics</i>, 2025, pp. 130–133, doi: <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">10.5162/ultrasonic2025/a18-a2</a>.","chicago":"Hölscher, Jonas, Olga Friesen, Leander Claes, Carsten Spieker, Jens Förstner, and Bernd Henning. “Multiscale Thermo-Piezoelectric Simulations Using the Finite Element Method.” In <i>2025 International Congress on Ultrasonics</i>, 130–133. Paderborn: AMA Service GmbH, 2025. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">https://doi.org/10.5162/ultrasonic2025/a18-a2</a>.","ama":"Hölscher J, Friesen O, Claes L, Spieker C, Förstner J, Henning B. Multiscale thermo-piezoelectric simulations using the finite element method. In: <i>2025 International Congress on Ultrasonics</i>. AMA Service GmbH; 2025:130–133. doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a2\">10.5162/ultrasonic2025/a18-a2</a>"},"page":"130–133","date_updated":"2026-01-13T12:59:56Z","publisher":"AMA Service GmbH","author":[{"last_name":"Hölscher","id":"73952","full_name":"Hölscher, Jonas","first_name":"Jonas"},{"first_name":"Olga","id":"44026","full_name":"Friesen, Olga","last_name":"Friesen"},{"first_name":"Leander","full_name":"Claes, Leander","id":"11829","orcid":"0000-0002-4393-268X","last_name":"Claes"},{"first_name":"Carsten","last_name":"Spieker","full_name":"Spieker, Carsten","id":"67587"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"},{"first_name":"Bernd","full_name":"Henning, Bernd","id":"213","last_name":"Henning"}],"date_created":"2025-11-25T12:23:06Z","title":"Multiscale thermo-piezoelectric simulations using the finite element method","doi":"10.5162/ultrasonic2025/a18-a2","type":"conference","publication":"2025 International Congress on Ultrasonics","status":"public","project":[{"name":"FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)","_id":"245"}],"_id":"62297","user_id":"11829","department":[{"_id":"49"},{"_id":"61"}],"language":[{"iso":"eng"}]},{"intvolume":"         4","page":"2356","citation":{"short":"M. Hammer, S. Khan, B. Taheri, H. Farheen, J. Förstner, Optics Continuum 4 (2025) 2356.","bibtex":"@article{Hammer_Khan_Taheri_Farheen_Förstner_2025, title={TFLN channel waveguides of rib and strip type: Properties of guided modes}, volume={4}, DOI={<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>}, number={10}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Khan, Shahriar and Taheri, Behnood and Farheen, Henna and Förstner, Jens}, year={2025}, pages={2356} }","mla":"Hammer, Manfred, et al. “TFLN Channel Waveguides of Rib and Strip Type: Properties of Guided Modes.” <i>Optics Continuum</i>, vol. 4, no. 10, Optica Publishing Group, 2025, p. 2356, doi:<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>.","apa":"Hammer, M., Khan, S., Taheri, B., Farheen, H., &#38; Förstner, J. (2025). TFLN channel waveguides of rib and strip type: Properties of guided modes. <i>Optics Continuum</i>, <i>4</i>(10), 2356. <a href=\"https://doi.org/10.1364/optcon.569959\">https://doi.org/10.1364/optcon.569959</a>","chicago":"Hammer, Manfred, Shahriar Khan, Behnood Taheri, Henna Farheen, and Jens Förstner. “TFLN Channel Waveguides of Rib and Strip Type: Properties of Guided Modes.” <i>Optics Continuum</i> 4, no. 10 (2025): 2356. <a href=\"https://doi.org/10.1364/optcon.569959\">https://doi.org/10.1364/optcon.569959</a>.","ieee":"M. Hammer, S. Khan, B. Taheri, H. Farheen, and J. Förstner, “TFLN channel waveguides of rib and strip type: Properties of guided modes,” <i>Optics Continuum</i>, vol. 4, no. 10, p. 2356, 2025, doi: <a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>.","ama":"Hammer M, Khan S, Taheri B, Farheen H, Förstner J. TFLN channel waveguides of rib and strip type: Properties of guided modes. <i>Optics Continuum</i>. 2025;4(10):2356. doi:<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>"},"publication_identifier":{"issn":["2770-0208"]},"has_accepted_license":"1","publication_status":"published","doi":"10.1364/optcon.569959","volume":4,"author":[{"last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"first_name":"Shahriar","full_name":"Khan, Shahriar","last_name":"Khan"},{"first_name":"Behnood","last_name":"Taheri","full_name":"Taheri, Behnood"},{"first_name":"Henna","orcid":"0000-0001-7730-3489","last_name":"Farheen","id":"53444","full_name":"Farheen, Henna"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"}],"date_updated":"2025-10-05T11:52:55Z","status":"public","type":"journal_article","file_date_updated":"2025-10-05T11:48:25Z","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"user_id":"158","_id":"60891","year":"2025","issue":"10","title":"TFLN channel waveguides of rib and strip type: Properties of guided modes","date_created":"2025-08-06T09:36:30Z","publisher":"Optica Publishing Group","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_name":"2025-08 Hammer - Optics Continuum - TFLN channel waveguides of rib and strip type. Properties of guided modes (official version).pdf","file_id":"61516","access_level":"closed","file_size":5417636,"date_created":"2025-10-05T11:48:25Z","creator":"fossie","date_updated":"2025-10-05T11:48:25Z"}],"abstract":[{"lang":"eng","text":"Straight dielectric waveguide channels made from slabs of thin-film lithium niobate (TFLN), or lithium niobate on insulator (LNOI), are investigated in the linear regime, for channels of rib and strip type with common trapezoidal cross sections, in Z-cut and X-cut samples at varying on-chip orientation. We clarify the theoretical basis for the waveguides with potentially non-diagonal core permittivity. Symmetry classes can be distinguished that differ in their consequences for potential modal degeneracy and polarization conversion. Our rigorous numerical analysis by means of a finite-element solver takes the anisotropy of the lithium niobate cores rigorously into account. We discuss extensive data for effective indices, polarization properties, and hybridization of guided modes, in single- and multimode channels. Scans over the waveguide width and orientation as primary parameters are complemented by a series of illustrations of vectorial mode profiles. These turn out to be essentially complex in cases of X-cut channels at non-crystal-axis-aligned orientations."}],"publication":"Optics Continuum","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"]},{"type":"conference","publication":"Photonic Computing: From Materials and Devices to Systems and Applications II","abstract":[{"text":"We present a topology-optimized silicon nitride (Si3N4) coupler designed to enhance the coupling efficiency between integrated single-photon emitters and photonic waveguide modes. By leveraging inverse design techniques, we optimize the coupler’s geometry to maximize power transfer while maintaining fabrication feasibility by improving mode overlap and directional emission, addressing the challenge of low coupling efficiency caused by size mismatch and material incompatibility. Simulations demonstrate a substantial enhancement in photon extraction and waveguide coupling. This approach can be extended to other photonic devices, offering a versatile framework for improving quantum light-matter interactions in integrated photonics.","lang":"eng"}],"editor":[{"full_name":"Ni, Xingjie","last_name":"Ni","first_name":"Xingjie"},{"last_name":"Cai","full_name":"Cai, Wenshan","first_name":"Wenshan"}],"status":"public","_id":"61760","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"publication_status":"published","year":"2025","citation":{"ama":"Farheen H, Chen Y, Chen P, et al. Topology-optimized silicon nitride coupler for integrated single-photon emitters. In: Ni X, Cai W, eds. <i>Photonic Computing: From Materials and Devices to Systems and Applications II</i>. SPIE; 2025. doi:<a href=\"https://doi.org/10.1117/12.3065734\">10.1117/12.3065734</a>","ieee":"H. Farheen <i>et al.</i>, “Topology-optimized silicon nitride coupler for integrated single-photon emitters,” in <i>Photonic Computing: From Materials and Devices to Systems and Applications II</i>, 2025, doi: <a href=\"https://doi.org/10.1117/12.3065734\">10.1117/12.3065734</a>.","chicago":"Farheen, Henna, Yuheng Chen, Peigang Chen, Artem Kryvobok, Samuel Peana, Alexander Senichev, Vladimir M. Shalaev, Alexandra Boltasseva, Jens Förstner, and Alexander V. Kildishev. “Topology-Optimized Silicon Nitride Coupler for Integrated Single-Photon Emitters.” In <i>Photonic Computing: From Materials and Devices to Systems and Applications II</i>, edited by Xingjie Ni and Wenshan Cai. SPIE, 2025. <a href=\"https://doi.org/10.1117/12.3065734\">https://doi.org/10.1117/12.3065734</a>.","bibtex":"@inproceedings{Farheen_Chen_Chen_Kryvobok_Peana_Senichev_Shalaev_Boltasseva_Förstner_Kildishev_2025, title={Topology-optimized silicon nitride coupler for integrated single-photon emitters}, DOI={<a href=\"https://doi.org/10.1117/12.3065734\">10.1117/12.3065734</a>}, booktitle={Photonic Computing: From Materials and Devices to Systems and Applications II}, publisher={SPIE}, author={Farheen, Henna and Chen, Yuheng and Chen, Peigang and Kryvobok, Artem and Peana, Samuel and Senichev, Alexander and Shalaev, Vladimir M. and Boltasseva, Alexandra and Förstner, Jens and Kildishev, Alexander V.}, editor={Ni, Xingjie and Cai, Wenshan}, year={2025} }","mla":"Farheen, Henna, et al. “Topology-Optimized Silicon Nitride Coupler for Integrated Single-Photon Emitters.” <i>Photonic Computing: From Materials and Devices to Systems and Applications II</i>, edited by Xingjie Ni and Wenshan Cai, SPIE, 2025, doi:<a href=\"https://doi.org/10.1117/12.3065734\">10.1117/12.3065734</a>.","short":"H. Farheen, Y. Chen, P. Chen, A. Kryvobok, S. Peana, A. Senichev, V.M. Shalaev, A. Boltasseva, J. Förstner, A.V. Kildishev, in: X. Ni, W. Cai (Eds.), Photonic Computing: From Materials and Devices to Systems and Applications II, SPIE, 2025.","apa":"Farheen, H., Chen, Y., Chen, P., Kryvobok, A., Peana, S., Senichev, A., Shalaev, V. M., Boltasseva, A., Förstner, J., &#38; Kildishev, A. V. (2025). Topology-optimized silicon nitride coupler for integrated single-photon emitters. In X. Ni &#38; W. Cai (Eds.), <i>Photonic Computing: From Materials and Devices to Systems and Applications II</i>. SPIE. <a href=\"https://doi.org/10.1117/12.3065734\">https://doi.org/10.1117/12.3065734</a>"},"publisher":"SPIE","date_updated":"2025-10-08T15:22:30Z","date_created":"2025-10-08T15:20:13Z","author":[{"last_name":"Farheen","orcid":"0000-0001-7730-3489","full_name":"Farheen, Henna","id":"53444","first_name":"Henna"},{"full_name":"Chen, Yuheng","last_name":"Chen","first_name":"Yuheng"},{"first_name":"Peigang","full_name":"Chen, Peigang","last_name":"Chen"},{"first_name":"Artem","full_name":"Kryvobok, Artem","last_name":"Kryvobok"},{"full_name":"Peana, Samuel","last_name":"Peana","first_name":"Samuel"},{"full_name":"Senichev, Alexander","last_name":"Senichev","first_name":"Alexander"},{"first_name":"Vladimir M.","full_name":"Shalaev, Vladimir M.","last_name":"Shalaev"},{"first_name":"Alexandra","last_name":"Boltasseva","full_name":"Boltasseva, Alexandra"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"},{"first_name":"Alexander V.","last_name":"Kildishev","full_name":"Kildishev, Alexander V."}],"title":"Topology-optimized silicon nitride coupler for integrated single-photon emitters","doi":"10.1117/12.3065734"},{"issue":"13","year":"2024","date_created":"2024-06-10T11:18:06Z","publisher":"Optica Publishing Group","title":"Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides","publication":"Optics Express","file":[{"relation":"main_file","content_type":"application/pdf","file_id":"54669","file_name":"2024-06 Hammer - Optics Express - Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides.pdf","access_level":"open_access","file_size":4004782,"date_created":"2024-06-10T11:25:00Z","creator":"fossie","date_updated":"2024-06-10T11:25:00Z"}],"abstract":[{"lang":"eng","text":"Samples of dielectric optical waveguides of rib or strip type in thin-film lithium niobate (TFLN) technology are characterized with respect to their optical loss using the Fabry-Pérot method. Attributing the losses mainly to sidewall roughness, we employ a simple perturbational procedure, based on rigorously computed mode profiles of idealized channels, to estimate the attenuation for waveguides with different cross sections. A single fit parameter suffices for an adequate modelling of the effect of the waveguide geometry on the loss levels."}],"language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_waveguide"],"publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["1094-4087"]},"citation":{"ieee":"M. Hammer <i>et al.</i>, “Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides,” <i>Optics Express</i>, vol. 32, no. 13, p. 22878, 2024, doi: <a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>.","chicago":"Hammer, Manfred, Silia Babel, Henna Farheen, Laura Padberg, J. Christoph Scheytt, Christine Silberhorn, and Jens Förstner. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” <i>Optics Express</i> 32, no. 13 (2024): 22878. <a href=\"https://doi.org/10.1364/oe.521766\">https://doi.org/10.1364/oe.521766</a>.","ama":"Hammer M, Babel S, Farheen H, et al. Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. <i>Optics Express</i>. 2024;32(13):22878. doi:<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>","mla":"Hammer, Manfred, et al. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” <i>Optics Express</i>, vol. 32, no. 13, Optica Publishing Group, 2024, p. 22878, doi:<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>.","bibtex":"@article{Hammer_Babel_Farheen_Padberg_Scheytt_Silberhorn_Förstner_2024, title={Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides}, volume={32}, DOI={<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>}, number={13}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Babel, Silia and Farheen, Henna and Padberg, Laura and Scheytt, J. Christoph and Silberhorn, Christine and Förstner, Jens}, year={2024}, pages={22878} }","short":"M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878.","apa":"Hammer, M., Babel, S., Farheen, H., Padberg, L., Scheytt, J. C., Silberhorn, C., &#38; Förstner, J. (2024). Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. <i>Optics Express</i>, <i>32</i>(13), 22878. <a href=\"https://doi.org/10.1364/oe.521766\">https://doi.org/10.1364/oe.521766</a>"},"page":"22878","intvolume":"        32","author":[{"full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","full_name":"Babel, Silia","id":"63231","first_name":"Silia"},{"orcid":"0000-0001-7730-3489","last_name":"Farheen","id":"53444","full_name":"Farheen, Henna","first_name":"Henna"},{"first_name":"Laura","id":"40300","full_name":"Padberg, Laura","last_name":"Padberg"},{"first_name":"J. Christoph","full_name":"Scheytt, J. Christoph","id":"37144","last_name":"Scheytt","orcid":"0000-0002-5950-6618 "},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"volume":32,"oa":"1","date_updated":"2024-07-22T07:43:02Z","doi":"10.1364/oe.521766","type":"journal_article","status":"public","user_id":"158","department":[{"_id":"61"},{"_id":"429"},{"_id":"623"},{"_id":"263"},{"_id":"288"}],"project":[{"grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"175","name":"TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)","grant_number":"231447078"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266","grant_number":"PROFILNRW-2020-067"}],"_id":"54668","file_date_updated":"2024-06-10T11:25:00Z"},{"type":"journal_article","status":"public","user_id":"158","department":[{"_id":"61"},{"_id":"230"}],"project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"52700","file_date_updated":"2024-03-21T10:39:32Z","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0031-8949","1402-4896"]},"citation":{"mla":"Myroshnychenko, Viktor, et al. “From Swiss-Cheese to Discrete Ferroelectric Composites: Assessing the Ferroelectric Butterfly Shape in Polarization Loops.” <i>Physica Scripta</i>, vol. 99, no. 4, IOP Publishing, 2024, p. 045952, doi:<a href=\"https://doi.org/10.1088/1402-4896/ad3172\">10.1088/1402-4896/ad3172</a>.","short":"V. Myroshnychenko, P.M. Mulavarickal Jose, H. Farheen, S. Ejaz, C. Brosseau, J. Förstner, Physica Scripta 99 (2024) 045952.","bibtex":"@article{Myroshnychenko_Mulavarickal Jose_Farheen_Ejaz_Brosseau_Förstner_2024, title={From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops}, volume={99}, DOI={<a href=\"https://doi.org/10.1088/1402-4896/ad3172\">10.1088/1402-4896/ad3172</a>}, number={4}, journal={Physica Scripta}, publisher={IOP Publishing}, author={Myroshnychenko, Viktor and Mulavarickal Jose, Pious Mathews and Farheen, Henna and Ejaz, Shafaq and Brosseau, Christian and Förstner, Jens}, year={2024}, pages={045952} }","apa":"Myroshnychenko, V., Mulavarickal Jose, P. M., Farheen, H., Ejaz, S., Brosseau, C., &#38; Förstner, J. (2024). From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops. <i>Physica Scripta</i>, <i>99</i>(4), 045952. <a href=\"https://doi.org/10.1088/1402-4896/ad3172\">https://doi.org/10.1088/1402-4896/ad3172</a>","ieee":"V. Myroshnychenko, P. M. Mulavarickal Jose, H. Farheen, S. Ejaz, C. Brosseau, and J. Förstner, “From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops,” <i>Physica Scripta</i>, vol. 99, no. 4, p. 045952, 2024, doi: <a href=\"https://doi.org/10.1088/1402-4896/ad3172\">10.1088/1402-4896/ad3172</a>.","chicago":"Myroshnychenko, Viktor, Pious Mathews Mulavarickal Jose, Henna Farheen, Shafaq Ejaz, Christian Brosseau, and Jens Förstner. “From Swiss-Cheese to Discrete Ferroelectric Composites: Assessing the Ferroelectric Butterfly Shape in Polarization Loops.” <i>Physica Scripta</i> 99, no. 4 (2024): 045952. <a href=\"https://doi.org/10.1088/1402-4896/ad3172\">https://doi.org/10.1088/1402-4896/ad3172</a>.","ama":"Myroshnychenko V, Mulavarickal Jose PM, Farheen H, Ejaz S, Brosseau C, Förstner J. From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops. <i>Physica Scripta</i>. 2024;99(4):045952. doi:<a href=\"https://doi.org/10.1088/1402-4896/ad3172\">10.1088/1402-4896/ad3172</a>"},"intvolume":"        99","page":"045952","author":[{"full_name":"Myroshnychenko, Viktor","id":"46371","last_name":"Myroshnychenko","first_name":"Viktor"},{"first_name":"Pious Mathews","full_name":"Mulavarickal Jose, Pious Mathews","last_name":"Mulavarickal Jose"},{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"last_name":"Ejaz","full_name":"Ejaz, Shafaq","first_name":"Shafaq"},{"full_name":"Brosseau, Christian","last_name":"Brosseau","first_name":"Christian"},{"id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"volume":99,"oa":"1","date_updated":"2024-07-22T07:43:53Z","doi":"10.1088/1402-4896/ad3172","publication":"Physica Scripta","file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2024-03-21T10:39:32Z","creator":"fossie","date_updated":"2024-03-21T10:39:32Z","file_name":"2024-03 Myroshnychenko - Physica Scripta - From Swiss-cheese to discrete ferroelectric.pdf","file_id":"52701","access_level":"open_access","file_size":5386508}],"abstract":[{"text":"We explore the polarization hysteretic behaviour and field-dependent permittivity of ferroelectric-dielectric 2D materials formed by random dispersions of low permittivity inclusions in a ferroelectric matrix, using finite element simulations. We show how the degree of impenetrability of dielectric inclusions plays a substantial role in controlling the coercive field, remnant and saturation polarizations of the homogenized materials. The results highlight the significance of the degree of impenetrability of inclusion in tuning the effective polarization properties of such ferroelectric composites: coercive field drops significantly as percolation threshold is attained and remnant polarization decreases faster than a linear decay.","lang":"eng"}],"language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_ferro"],"issue":"4","year":"2024","date_created":"2024-03-21T10:34:48Z","publisher":"IOP Publishing","title":"From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops"},{"publication":"Journal of the Optical Society of America B","abstract":[{"lang":"eng","text":"Lateral leakage of TM modes in dielectric optical waveguides of rib/ridge or strip-loaded types can be fully suppressed, if the waveguide core is formed not through a strip that protrudes at one side (up) from the remaining lateral guiding slab, but through parallel strips on both sides (up and down), such that the resulting cross section becomes vertically symmetric. The fairly general arguments underlying the leakage suppression apply to TM modes of all orders simultaneously, and are independent of wavelength. These plus-shaped waveguides support strictly guided, non-leaky TM modes for, in principle, arbitrarily shallow etching."}],"file":[{"relation":"main_file","content_type":"application/pdf","file_size":920206,"file_id":"55752","file_name":"2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching.pdf","access_level":"local","date_updated":"2024-08-25T10:30:28Z","creator":"fossie","date_created":"2024-08-25T10:30:28Z"},{"content_type":"application/pdf","relation":"main_file","creator":"fossie","date_created":"2024-08-25T10:48:05Z","date_updated":"2024-08-25T10:48:05Z","access_level":"open_access","file_name":"2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching (preprint).pdf","file_id":"55753","title":"(preprint)","file_size":931810}],"ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"issue":"9","year":"2024","publisher":"Optica Publishing Group","date_created":"2024-08-25T10:24:58Z","title":"Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching","type":"journal_article","status":"public","project":[{"name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266","grant_number":"PROFILNRW-2020-067"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"}],"_id":"55751","user_id":"158","department":[{"_id":"61"},{"_id":"429"}],"article_type":"original","file_date_updated":"2024-08-25T10:48:05Z","publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]},"has_accepted_license":"1","citation":{"apa":"Üstün, N., Farheen, H., Hammer, M., &#38; Förstner, J. (2024). Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching. <i>Journal of the Optical Society of America B</i>, <i>41</i>(9), 2077. <a href=\"https://doi.org/10.1364/josab.528729\">https://doi.org/10.1364/josab.528729</a>","mla":"Üstün, Necati, et al. “Symmetry-Protected TM Modes in Rib-like, plus-Shaped Optical Waveguides with Shallow Etching.” <i>Journal of the Optical Society of America B</i>, vol. 41, no. 9, Optica Publishing Group, 2024, p. 2077, doi:<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>.","short":"N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society of America B 41 (2024) 2077.","bibtex":"@article{Üstün_Farheen_Hammer_Förstner_2024, title={Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching}, volume={41}, DOI={<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>}, number={9}, journal={Journal of the Optical Society of America B}, publisher={Optica Publishing Group}, author={Üstün, Necati and Farheen, Henna and Hammer, Manfred and Förstner, Jens}, year={2024}, pages={2077} }","ama":"Üstün N, Farheen H, Hammer M, Förstner J. Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching. <i>Journal of the Optical Society of America B</i>. 2024;41(9):2077. doi:<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>","chicago":"Üstün, Necati, Henna Farheen, Manfred Hammer, and Jens Förstner. “Symmetry-Protected TM Modes in Rib-like, plus-Shaped Optical Waveguides with Shallow Etching.” <i>Journal of the Optical Society of America B</i> 41, no. 9 (2024): 2077. <a href=\"https://doi.org/10.1364/josab.528729\">https://doi.org/10.1364/josab.528729</a>.","ieee":"N. Üstün, H. Farheen, M. Hammer, and J. Förstner, “Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching,” <i>Journal of the Optical Society of America B</i>, vol. 41, no. 9, p. 2077, 2024, doi: <a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>."},"intvolume":"        41","page":"2077","oa":"1","date_updated":"2024-08-25T10:48:42Z","author":[{"full_name":"Üstün, Necati","last_name":"Üstün","first_name":"Necati"},{"last_name":"Farheen","orcid":"0000-0001-7730-3489","id":"53444","full_name":"Farheen, Henna","first_name":"Henna"},{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"volume":41,"doi":"10.1364/josab.528729"},{"doi":"10.1088/2515-7647/ad6ed4","volume":6,"author":[{"first_name":"Henna","full_name":"Farheen, Henna","id":"53444","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"first_name":"Suraj","full_name":"Joshi, Suraj","last_name":"Joshi"},{"first_name":"J. Christoph","full_name":"Scheytt, J. Christoph","id":"37144","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt"},{"first_name":"Viktor","full_name":"Myroshnychenko, Viktor","id":"46371","last_name":"Myroshnychenko"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"oa":"1","date_updated":"2024-09-02T12:23:55Z","intvolume":"         6","page":"045010","citation":{"ama":"Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient compact blazed grating antenna for optical phased arrays. <i>Journal of Physics: Photonics</i>. 2024;6:045010. doi:<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>","ieee":"H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “An efficient compact blazed grating antenna for optical phased arrays,” <i>Journal of Physics: Photonics</i>, vol. 6, p. 045010, 2024, doi: <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>.","chicago":"Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased Arrays.” <i>Journal of Physics: Photonics</i> 6 (2024): 045010. <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">https://doi.org/10.1088/2515-7647/ad6ed4</a>.","bibtex":"@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An efficient compact blazed grating antenna for optical phased arrays}, volume={6}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen, Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2024}, pages={045010} }","short":"H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal of Physics: Photonics 6 (2024) 045010.","mla":"Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical Phased Arrays.” <i>Journal of Physics: Photonics</i>, vol. 6, IOP Publishing, 2024, p. 045010, doi:<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>.","apa":"Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2024). An efficient compact blazed grating antenna for optical phased arrays. <i>Journal of Physics: Photonics</i>, <i>6</i>, 045010. <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">https://doi.org/10.1088/2515-7647/ad6ed4</a>"},"publication_identifier":{"issn":["2515-7647"]},"has_accepted_license":"1","publication_status":"published","file_date_updated":"2024-09-02T12:13:55Z","article_type":"original","department":[{"_id":"61"},{"_id":"429"},{"_id":"58"}],"user_id":"158","_id":"55989","project":[{"_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing","grant_number":"PROFILNRW-2020-067"},{"grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"grant_number":"231447078","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"status":"public","type":"journal_article","title":"An efficient compact blazed grating antenna for optical phased arrays","date_created":"2024-09-02T12:08:18Z","publisher":"IOP Publishing","year":"2024","language":[{"iso":"eng"}],"keyword":["tet_topic_opticalantenna"],"ddc":["530"],"file":[{"relation":"main_file","content_type":"application/pdf","file_size":1492402,"file_id":"55990","file_name":"2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating antenna for optical phased arrays (official version).pdf","access_level":"open_access","date_updated":"2024-09-02T12:13:55Z","creator":"fossie","date_created":"2024-09-02T12:13:55Z"}],"abstract":[{"lang":"eng","text":"Phased arrays are vital in communication systems and have received significant interest in the field of optoelectronics and photonics, enabling a wide range of applications such as LiDAR, holography, wireless communication, etc. In this work, we present a blazed grating antenna that is optimized to have upward radiation efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna in a 64 × 64 phased array configuration is capable of producing desired far-field radiation patterns. Additionally, our antenna possesses a low side lobe level of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive candidate for integrated optical phased arrays."}],"publication":"Journal of Physics: Photonics"},{"has_accepted_license":"1","publication_identifier":{"issn":["2770-0208"]},"publication_status":"published","page":"532822","citation":{"ama":"Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>. Published online 2024:532822. doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>","ieee":"M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium niobate slabs,” <i>Optics Continuum</i>, p. 532822, 2024, doi: <a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>.","chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, 2024, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>.","apa":"Hammer, M., Farheen, H., &#38; Förstner, J. (2024). Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>","mla":"Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, Optica Publishing Group, 2024, p. 532822, doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>.","bibtex":"@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film lithium niobate slabs}, DOI={<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2024}, pages={532822} }","short":"M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822."},"author":[{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","id":"48077","full_name":"Hammer, Manfred"},{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"date_updated":"2024-11-04T17:07:27Z","doi":"10.1364/optcon.532822","type":"journal_article","status":"public","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"56193","project":[{"name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266","grant_number":"PROFILNRW-2020-067"},{"grant_number":"231447078","_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)"},{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","grant_number":"231447078"}],"file_date_updated":"2024-11-04T17:05:30Z","year":"2024","date_created":"2024-09-21T09:17:16Z","publisher":"Optica Publishing Group","title":"Guided modes of thin-film lithium niobate slabs","publication":"Optics Continuum","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_name":"2024-11 Hammer - Optics Continuum - Guided modes of thin-film lithium niobate slabs.pdf","file_id":"56864","access_level":"closed","file_size":4399685,"creator":"fossie","date_created":"2024-11-04T17:05:30Z","date_updated":"2024-11-04T17:05:30Z"}],"abstract":[{"lang":"eng","text":"Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media are consid-ered, for operation in the linear regime. We outline and implement a largely analytic procedure forrigorous modal analysis of three-layer slabs with birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant TE or TM polarization, and with effective indices that depend on the propagation directionof the modes, relative to the crystal axes. Strong hybridization can be observed for near degeneratemodes in singular configurations without vertical symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same symmetry class. Dispersion curves for slab thickness and propa-gation angle are discussed, for slabs with oxide and air cover. "}],"language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"]},{"publication_status":"published","citation":{"chicago":"Schröder, Dominik, Ulrich Kiefner, Christian Hedayat, and Jens Förstner. “Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources.” In <i>2024 International Symposium on Electromagnetic Compatibility – EMC Europe</i>. IEEE, 2024. <a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">https://doi.org/10.1109/emceurope59828.2024.10722220</a>.","ieee":"D. Schröder, U. Kiefner, C. Hedayat, and J. Förstner, “Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources,” 2024, doi: <a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">10.1109/emceurope59828.2024.10722220</a>.","ama":"Schröder D, Kiefner U, Hedayat C, Förstner J. Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources. In: <i>2024 International Symposium on Electromagnetic Compatibility – EMC Europe</i>. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">10.1109/emceurope59828.2024.10722220</a>","apa":"Schröder, D., Kiefner, U., Hedayat, C., &#38; Förstner, J. (2024). Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources. <i>2024 International Symposium on Electromagnetic Compatibility – EMC Europe</i>. <a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">https://doi.org/10.1109/emceurope59828.2024.10722220</a>","short":"D. Schröder, U. Kiefner, C. Hedayat, J. Förstner, in: 2024 International Symposium on Electromagnetic Compatibility – EMC Europe, IEEE, 2024.","mla":"Schröder, Dominik, et al. “Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources.” <i>2024 International Symposium on Electromagnetic Compatibility – EMC Europe</i>, IEEE, 2024, doi:<a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">10.1109/emceurope59828.2024.10722220</a>.","bibtex":"@inproceedings{Schröder_Kiefner_Hedayat_Förstner_2024, title={Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources}, DOI={<a href=\"https://doi.org/10.1109/emceurope59828.2024.10722220\">10.1109/emceurope59828.2024.10722220</a>}, booktitle={2024 International Symposium on Electromagnetic Compatibility – EMC Europe}, publisher={IEEE}, author={Schröder, Dominik and Kiefner, Ulrich and Hedayat, Christian and Förstner, Jens}, year={2024} }"},"year":"2024","date_created":"2024-11-30T17:54:35Z","author":[{"first_name":"Dominik","full_name":"Schröder, Dominik","last_name":"Schröder"},{"first_name":"Ulrich","last_name":"Kiefner","full_name":"Kiefner, Ulrich"},{"last_name":"Hedayat","full_name":"Hedayat, Christian","first_name":"Christian"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"publisher":"IEEE","date_updated":"2024-11-30T19:30:59Z","doi":"10.1109/emceurope59828.2024.10722220","title":"Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources","type":"conference","publication":"2024 International Symposium on Electromagnetic Compatibility – EMC Europe","status":"public","abstract":[{"text":"Based on the surface equivalence principle an equivalent near-field source can be determined by measurements with a near-field scanner. One application is to use the source to simulate the interferences of the device-under-test with other objects in its close environment. Due to a limited signal-to-noise ratio in practical applications, noise adds to the near-field source. Hence, noise effects affect the quality of the simulation results and cause uncertainties. The influence of the noise effects is investigated by a simulative approach with artificially added noise. Two test devices with different a geometric dimension, operating frequency and excited power are evaluated for different characteristics and signal-to-noise ratios to assess the impact of the simulation results. Finally, in a combined simulation an equivalent near-field source will disturb an IoT-device and the voltages at two resistors on the device are examined.","lang":"eng"}],"user_id":"158","department":[{"_id":"61"}],"_id":"57528","language":[{"iso":"eng"}],"keyword":["tet_topic_hf","tet_enas"]},{"publication":"Advanced Quantum Technologies","abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>The biexciton‐exciton emission cascade commonly used in quantum‐dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work, it focuses on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishability. It achieves this goal by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum‐dot cavity excitation dynamics with full access to photon properties. It reports non‐trivial dependencies on system parameters and use the predictive power of the combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values, here specifically for the telecom C‐band at 1550 nm.</jats:p>","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["tet_topic_qd"],"year":"2023","date_created":"2023-11-03T10:07:38Z","publisher":"Wiley","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","type":"journal_article","status":"public","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"user_id":"158","_id":"48599","project":[{"grant_number":"231447078","_id":"173","name":"TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen (C09*)"},{"_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","grant_number":"231447078"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"related_material":{"record":[{"relation":"earlier_version","id":"43246","status":"public"}]},"publication_identifier":{"issn":["2511-9044","2511-9044"]},"publication_status":"published","citation":{"ama":"Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>. Published online 2023. doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>","ieee":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” <i>Advanced Quantum Technologies</i>, 2023, doi: <a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>.","chicago":"Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i>, 2023. <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>.","apa":"Bauch, D., Siebert, D., Jöns, K., Förstner, J., &#38; Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>. <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, DOI={<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }","mla":"Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i>, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>.","short":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies (2023)."},"author":[{"first_name":"David","last_name":"Bauch","full_name":"Bauch, David"},{"first_name":"Dustin","full_name":"Siebert, Dustin","last_name":"Siebert"},{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951"}],"date_updated":"2023-12-21T10:41:17Z","oa":"1","doi":"10.1002/qute.202300142","main_file_link":[{"open_access":"1","url":"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142"}]},{"citation":{"short":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023).","mla":"Bauch, David, et al. <i>On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs</i>. 2023.","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }","apa":"Bauch, D., Siebert, D., Jöns, K., Förstner, J., &#38; Schumacher, S. (2023). <i>On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs</i>.","ieee":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs.” 2023.","chicago":"Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs,” 2023.","ama":"Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs. Published online 2023."},"year":"2023","related_material":{"record":[{"status":"public","relation":"later_version","id":"48599"}]},"main_file_link":[{"url":"https://arxiv.org/pdf/2303.13871.pdf","open_access":"1"}],"title":"On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs","date_created":"2023-03-31T13:22:05Z","author":[{"full_name":"Bauch, David","last_name":"Bauch","first_name":"David"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan","id":"27271","first_name":"Stefan"}],"oa":"1","date_updated":"2023-12-21T10:41:17Z","status":"public","abstract":[{"text":"The biexciton-exciton emission cascade commonly used in quantum-dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work we focus on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishibility. We achieve this goal by selectively reducing the biexciton lifetime with an optical resonator. We demonstrate that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and two-fold degenerate optical modes. Our in-depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum-dot cavity excitation dynamics with full access to photon properties. We report non-trivial dependencies on system parameters and use the predictive power of our combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values in the telecom C-band at $1550\\,\\mathrm{nm}$.","lang":"eng"}],"type":"preprint","language":[{"iso":"eng"}],"keyword":["tet_topic_phc","tet_topic_qd"],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"},{"_id":"15"},{"_id":"35"},{"_id":"170"},{"_id":"297"}],"user_id":"16199","_id":"43246","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"173","name":"TRR 142 - C09: TRR 142 - Subproject C09","grant_number":"231447078"},{"grant_number":"231447078","name":"TRR 142 - B06: TRR 142 - Subproject B06","_id":"167"},{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"}]},{"keyword":["tet_topic_opticalantenna"],"ddc":["530"],"language":[{"iso":"eng"}],"publication":"Photonics and Nanostructures - Fundamentals and Applications","abstract":[{"text":"Silicon photonics, in conjunction with complementary metal-oxide-semiconductor (CMOS) fabrication, has greatly enhanced the development of integrated optical phased arrays. This facilitates a dynamic control of light in a compact form factor that enables the synthesis of arbitrary complex wavefronts in the infrared spectrum. We numerically demonstrate a large-scale two-dimensional silicon-based optical phased array (OPA) composed of nanoantennas with circular gratings that are balanced in power and aligned in phase, required for producing elegant radiation patterns in the far-field. For a wavelength of 1.55 μm, we optimize two antennas for the OPA exhibiting an upward radiation efficiency as high as 90%, with almost 6.8% of optical power concentrated in the field of view. Additionally, we believe that the proposed OPAs can be easily fabricated and would have the ability to generate complex holographic images, rendering them an attractive candidate for a wide range of applications like LiDAR sensors, optical trapping, optogenetic stimulation, and augmented-reality displays.","lang":"eng"}],"file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2023-12-21T09:34:17Z","creator":"fossie","date_created":"2023-12-21T09:34:17Z","file_size":3339442,"access_level":"open_access","file_id":"50013","file_name":"2ß23-12 Farheen - PNFA - Optimized, highly efficient silicon antennas for optical phased arrays.pdf"}],"publisher":"Elsevier BV","date_created":"2023-12-21T09:30:03Z","title":"Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays","year":"2023","_id":"50012","project":[{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"},{"_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","grant_number":"231447078"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"58"}],"user_id":"158","file_date_updated":"2023-12-21T09:34:17Z","type":"journal_article","status":"public","date_updated":"2024-07-22T07:44:33Z","oa":"1","volume":58,"author":[{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"first_name":"Andreas","last_name":"Strauch","full_name":"Strauch, Andreas"},{"first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","full_name":"Scheytt, J. Christoph","id":"37144"},{"first_name":"Viktor","last_name":"Myroshnychenko","full_name":"Myroshnychenko, Viktor","id":"46371"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"doi":"10.1016/j.photonics.2023.101207","publication_identifier":{"issn":["1569-4410"]},"has_accepted_license":"1","publication_status":"published","related_material":{"link":[{"relation":"research_data","url":"https://doi.org/10.5281/zenodo.10044122"}]},"intvolume":"        58","page":"101207","citation":{"ieee":"H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays,” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 58, p. 101207, 2023, doi: <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>.","chicago":"Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i> 58 (2023): 101207. <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">https://doi.org/10.1016/j.photonics.2023.101207</a>.","ama":"Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. <i>Photonics and Nanostructures - Fundamentals and Applications</i>. 2023;58:101207. doi:<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>","mla":"Farheen, Henna, et al. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 58, Elsevier BV, 2023, p. 101207, doi:<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>.","short":"H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications 58 (2023) 101207.","bibtex":"@article{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays}, volume={58}, DOI={<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>}, journal={Photonics and Nanostructures - Fundamentals and Applications}, publisher={Elsevier BV}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2023}, pages={101207} }","apa":"Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2023). Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. <i>Photonics and Nanostructures - Fundamentals and Applications</i>, <i>58</i>, 101207. <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">https://doi.org/10.1016/j.photonics.2023.101207</a>"}},{"publisher":"Optica Publishing Group","date_created":"2023-03-31T13:04:43Z","title":"How to suppress radiative losses in high-contrast integrated Bragg gratings","issue":"4","year":"2023","ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"publication":"Journal of the Optical Society of America B","abstract":[{"lang":"eng","text":"High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated. For specific oblique excitation by semi-guided waves at sufficiently high angles of incidence, the idealized structures do not exhibit any radiative losses, such that reflectance and transmittance for the single port mode add strictly up to one. We consider a series of symmetric, fully and partly etched finite gratings, for parameters found in integrated silicon photonics. These can act as spectral filters with a reasonably flattop response. Apodization can lead to more box shaped reflectance and transmittance spectra. Together with a narrowband Fabry–Perot filter, these configurations are characterized by reflection bands, or transmittance peaks, with widths that span three orders of magnitude."}],"file":[{"relation":"main_file","content_type":"application/pdf","file_size":1982311,"file_id":"43247","access_level":"open_access","file_name":"ogr-afterreview.pdf","date_updated":"2023-03-31T13:14:59Z","creator":"fossie","date_created":"2023-03-31T13:14:59Z"}],"date_updated":"2024-07-22T07:44:38Z","oa":"1","author":[{"orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"volume":40,"doi":"10.1364/josab.485725","publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]},"has_accepted_license":"1","citation":{"chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” <i>Journal of the Optical Society of America B</i> 40, no. 4 (2023): 862. <a href=\"https://doi.org/10.1364/josab.485725\">https://doi.org/10.1364/josab.485725</a>.","ieee":"M. Hammer, H. Farheen, and J. Förstner, “How to suppress radiative losses in high-contrast integrated Bragg gratings,” <i>Journal of the Optical Society of America B</i>, vol. 40, no. 4, p. 862, 2023, doi: <a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>.","ama":"Hammer M, Farheen H, Förstner J. How to suppress radiative losses in high-contrast integrated Bragg gratings. <i>Journal of the Optical Society of America B</i>. 2023;40(4):862. doi:<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>","short":"M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.","mla":"Hammer, Manfred, et al. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” <i>Journal of the Optical Society of America B</i>, vol. 40, no. 4, Optica Publishing Group, 2023, p. 862, doi:<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>.","bibtex":"@article{Hammer_Farheen_Förstner_2023, title={How to suppress radiative losses in high-contrast integrated Bragg gratings}, volume={40}, DOI={<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>}, number={4}, journal={Journal of the Optical Society of America B}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2023}, pages={862} }","apa":"Hammer, M., Farheen, H., &#38; Förstner, J. (2023). How to suppress radiative losses in high-contrast integrated Bragg gratings. <i>Journal of the Optical Society of America B</i>, <i>40</i>(4), 862. <a href=\"https://doi.org/10.1364/josab.485725\">https://doi.org/10.1364/josab.485725</a>"},"page":"862","intvolume":"        40","project":[{"name":"TRR 142: TRR 142","_id":"53","grant_number":"231447078"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - B06: TRR 142 - Subproject B06","_id":"167","grant_number":"231447078"}],"_id":"43245","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"file_date_updated":"2023-03-31T13:14:59Z","type":"journal_article","status":"public"},{"publication":"Integrated Optics: Devices, Materials, and Technologies XXVII","abstract":[{"lang":"eng","text":"We demonstrate a large-scale two dimensional silicon-based optical phased array (OPA) composed of nanoantennas with circular gratings that are balanced in power and aligned in phase, required for producing desired radiation patterns in the far-field. The OPAs are numerically optimized to have an upward efficiency of up to 90%, targeting radiation concentration mainly in the field of view. We envision that our OPAs have the ability of generating complex holographic images, rendering them an attractive candidate for a wide range of applications like LiDAR sensors, optical trapping, optogenetic stimulation and augmented-reality displays."}],"file":[{"date_updated":"2023-03-22T20:53:11Z","date_created":"2023-03-22T07:41:49Z","creator":"fossie","file_size":1747396,"file_name":"2023-01 Poster Photonics West Henna OPA_A0.pdf","file_id":"43055","access_level":"request","content_type":"application/pdf","relation":"main_file"}],"keyword":["tet_topic_opticalantenna"],"ddc":["530"],"language":[{"iso":"eng"}],"year":"2023","publisher":"SPIE","date_created":"2023-03-21T12:35:18Z","title":"Optimized silicon antennas for optical phased arrays","type":"conference","editor":[{"first_name":"Sonia M.","full_name":"García-Blanco, Sonia M.","last_name":"García-Blanco"},{"first_name":"Pavel","full_name":"Cheben, Pavel","last_name":"Cheben"}],"status":"public","_id":"43052","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","file_date_updated":"2023-03-22T20:53:11Z","has_accepted_license":"1","publication_status":"published","page":"124241D ","citation":{"ama":"Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized silicon antennas for optical phased arrays. In: García-Blanco SM, Cheben P, eds. <i>Integrated Optics: Devices, Materials, and Technologies XXVII</i>. SPIE; 2023:124241D. doi:<a href=\"https://doi.org/10.1117/12.2658716\">10.1117/12.2658716</a>","ieee":"H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Optimized silicon antennas for optical phased arrays,” in <i>Integrated Optics: Devices, Materials, and Technologies XXVII</i>, 2023, p. 124241D, doi: <a href=\"https://doi.org/10.1117/12.2658716\">10.1117/12.2658716</a>.","chicago":"Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Optimized Silicon Antennas for Optical Phased Arrays.” In <i>Integrated Optics: Devices, Materials, and Technologies XXVII</i>, edited by Sonia M. García-Blanco and Pavel Cheben, 124241D. SPIE, 2023. <a href=\"https://doi.org/10.1117/12.2658716\">https://doi.org/10.1117/12.2658716</a>.","short":"H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVII, SPIE, 2023, p. 124241D.","mla":"Farheen, Henna, et al. “Optimized Silicon Antennas for Optical Phased Arrays.” <i>Integrated Optics: Devices, Materials, and Technologies XXVII</i>, edited by Sonia M. García-Blanco and Pavel Cheben, SPIE, 2023, p. 124241D, doi:<a href=\"https://doi.org/10.1117/12.2658716\">10.1117/12.2658716</a>.","bibtex":"@inproceedings{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized silicon antennas for optical phased arrays}, DOI={<a href=\"https://doi.org/10.1117/12.2658716\">10.1117/12.2658716</a>}, booktitle={Integrated Optics: Devices, Materials, and Technologies XXVII}, publisher={SPIE}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, editor={García-Blanco, Sonia M. and Cheben, Pavel}, year={2023}, pages={124241D} }","apa":"Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2023). Optimized silicon antennas for optical phased arrays. In S. M. García-Blanco &#38; P. Cheben (Eds.), <i>Integrated Optics: Devices, Materials, and Technologies XXVII</i> (p. 124241D). SPIE. <a href=\"https://doi.org/10.1117/12.2658716\">https://doi.org/10.1117/12.2658716</a>"},"date_updated":"2024-07-22T07:44:46Z","author":[{"last_name":"Farheen","orcid":"0000-0001-7730-3489","id":"53444","full_name":"Farheen, Henna","first_name":"Henna"},{"first_name":"Andreas","full_name":"Strauch, Andreas","last_name":"Strauch"},{"last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618","full_name":"Scheytt, J. Christoph","id":"37144","first_name":"J. Christoph"},{"first_name":"Viktor","full_name":"Myroshnychenko, Viktor","id":"46371","last_name":"Myroshnychenko"},{"full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"}],"doi":"10.1117/12.2658716"},{"keyword":["tet_topic_opticalantenna"],"language":[{"iso":"eng"}],"_id":"50466","project":[{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"grant_number":"231447078","_id":"75","name":"TRR 142 - C05: TRR 142 - Nichtlineare optische Oberflächen basierend auf ZnO-plasmonischen Hybrid-Nanostrukturen (C05)"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","abstract":[{"text":"A key challenge in designing efficient optical phased arrays is the lack of a well-designed radiator. This work explores horn antennas numerically optimized to target high upward radiation efficiency to be employed in silicon-based phased arrays capable of producing elegant radiation patterns in the far-field.","lang":"eng"}],"status":"public","publication":"2023 IEEE Photonics Conference (IPC)","type":"conference","title":"Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas","doi":"10.1109/ipc57732.2023.10360519","date_updated":"2024-07-22T07:48:53Z","publisher":"IEEE","date_created":"2024-01-12T07:37:54Z","author":[{"first_name":"Henna","full_name":"Farheen, Henna","id":"53444","orcid":"0000-0001-7730-3489","last_name":"Farheen"},{"last_name":"Joshi","full_name":"Joshi, S.","first_name":"S."},{"first_name":"J. Christoph","id":"37144","full_name":"Scheytt, J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt"},{"last_name":"Myroshnychenko","full_name":"Myroshnychenko, Viktor","id":"46371","first_name":"Viktor"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"year":"2023","citation":{"chicago":"Farheen, Henna, S. Joshi, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Increasing the Upward Radiation Efficiency of Optical Phased Arrays Using Asymmetric Silicon Horn Antennas.” In <i>2023 IEEE Photonics Conference (IPC)</i>. IEEE, 2023. <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">https://doi.org/10.1109/ipc57732.2023.10360519</a>.","ieee":"H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas,” 2023, doi: <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>.","ama":"Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas. In: <i>2023 IEEE Photonics Conference (IPC)</i>. IEEE; 2023. doi:<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>","bibtex":"@inproceedings{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2023, title={Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas}, DOI={<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>}, booktitle={2023 IEEE Photonics Conference (IPC)}, publisher={IEEE}, author={Farheen, Henna and Joshi, S. and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2023} }","mla":"Farheen, Henna, et al. “Increasing the Upward Radiation Efficiency of Optical Phased Arrays Using Asymmetric Silicon Horn Antennas.” <i>2023 IEEE Photonics Conference (IPC)</i>, IEEE, 2023, doi:<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>.","short":"H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in: 2023 IEEE Photonics Conference (IPC), IEEE, 2023.","apa":"Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2023). Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas. <i>2023 IEEE Photonics Conference (IPC)</i>. <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">https://doi.org/10.1109/ipc57732.2023.10360519</a>"},"publication_status":"published"}]