[{"author":[{"last_name":"Hammer","orcid":"0000-0002-6331-9348","id":"48077","full_name":"Hammer, Manfred","first_name":"Manfred"},{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"oa":"1","date_updated":"2022-03-22T18:04:20Z","doi":"10.1117/12.2612179","has_accepted_license":"1","publication_status":"published","page":"120170F","citation":{"ama":"Hammer M, Ebers L, Förstner J. Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber. In: Andrews DL, Galvez EJ, Rubinsztein-Dunlop H, eds. <i>Complex Light and Optical Forces XVI</i>. SPIE; 2022:120170F. doi:<a href=\"https://doi.org/10.1117/12.2612179\">10.1117/12.2612179</a>","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” In <i>Complex Light and Optical Forces XVI</i>, edited by David L. Andrews, Enrique J. Galvez, and Halina Rubinsztein-Dunlop, 120170F. SPIE, 2022. <a href=\"https://doi.org/10.1117/12.2612179\">https://doi.org/10.1117/12.2612179</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber,” in <i>Complex Light and Optical Forces XVI</i>, 2022, p. 120170F, doi: <a href=\"https://doi.org/10.1117/12.2612179\">10.1117/12.2612179</a>.","short":"M. Hammer, L. Ebers, J. Förstner, in: D.L. Andrews, E.J. Galvez, H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI, SPIE, 2022, p. 120170F.","bibtex":"@inproceedings{Hammer_Ebers_Förstner_2022, title={Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber}, DOI={<a href=\"https://doi.org/10.1117/12.2612179\">10.1117/12.2612179</a>}, booktitle={Complex Light and Optical Forces XVI}, publisher={SPIE}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, editor={Andrews, David L. and Galvez, Enrique J. and Rubinsztein-Dunlop, Halina}, year={2022}, pages={120170F} }","mla":"Hammer, Manfred, et al. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” <i>Complex Light and Optical Forces XVI</i>, edited by David L. Andrews et al., SPIE, 2022, p. 120170F, doi:<a href=\"https://doi.org/10.1117/12.2612179\">10.1117/12.2612179</a>.","apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2022). Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber. In D. L. Andrews, E. J. Galvez, &#38; H. Rubinsztein-Dunlop (Eds.), <i>Complex Light and Optical Forces XVI</i> (p. 120170F). SPIE. <a href=\"https://doi.org/10.1117/12.2612179\">https://doi.org/10.1117/12.2612179</a>"},"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"30387","project":[{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}],"file_date_updated":"2022-03-22T18:03:50Z","type":"conference","status":"public","editor":[{"full_name":"Andrews, David L.","last_name":"Andrews","first_name":"David L."},{"full_name":"Galvez, Enrique J.","last_name":"Galvez","first_name":"Enrique J."},{"last_name":"Rubinsztein-Dunlop","full_name":"Rubinsztein-Dunlop, Halina","first_name":"Halina"}],"date_created":"2022-03-21T10:12:58Z","publisher":"SPIE","title":"Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber","year":"2022","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"publication":"Complex Light and Optical Forces XVI","file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2022-03-22T18:03:50Z","date_created":"2022-03-22T18:03:50Z","creator":"fossie","file_size":2015899,"file_id":"30444","file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Resonant evanescent excitation of OAM modes in a high-contrast circular (official version).pdf","access_level":"open_access"}],"abstract":[{"text":"Resonant evanescent coupling can be utilized to selectively excite orbital angular momentum (OAM) modes of high angular order supported by a thin circular dielectric rod. Our 2.5-D hybrid-analytical coupled mode model combines the vectorial fields associated with the fundamental TE- and TM-modes of a standard silicon photonics slab waveguide, propagating at oblique angles with respect to the rod axis, and the hybrid modes supported by the rod. One observes an efficient resonant interaction in cases where the common axial wavenumber of the waves in the slab matches the propagation constant of one or more modes of the rod. For certain modes of high angular order, the incident wave is able to transfer its directionality to the field in the fiber, exciting effectively only one of a pair of degenerate OAM modes","lang":"eng"}]},{"department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","_id":"30722","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"type":"dissertation","status":"public","abstract":[{"lang":"eng","text":"In dieser Arbeit wird die elektromagnetische Wellenausbreitung in integrierten optischen Wellenleitern mit Hilfe von halb analytischen und numerischen Simulationsmethoden untersucht. Im ersten Teil werden 2-D Si/SiO2-Wellenleiterkonfigurationen mit hohem Brechungsindexkontrast betrachtet. Die Strukturen werden mit halb geführten Wellen unter schrägen Ausbreitungswinkeln angeregt. Dadurch kann die Leistungsübertragung zu bestimmten ausgehenden Moden unterdrückt werden, wodurch vollständig verlustfreie Systeme entstehen. Zusätzlich dient die Anregung mit einem seitlich begrenzten, einfallenden Wellenbündel aus halb geführten Wellen dazu, praktisch relevantere 3-D Konfigurationen zu realisieren. Darüber hinaus wird eine schrittweise Winkelspektrum-Methode vorgestellt, die es ermöglicht, in Kombination mit voll vektoriellen 2-D Finite-Elemente-Lösungen für Teilprobleme mit geringerer Komplexität, die Wellenausbreitung in planaren, linsenförmigen Wellenleitern numerisch in drei Raumrichtungen zu berechnen. Im zweiten Teil dieser Arbeit wird die Ausbreitung in Wellenleiterstrukturen aus Lithiumniobat untersucht, welche für quantenoptische Effekte genutzt werden. Zur Detektion einzelner Photonen werden supraleitende Nanodrähte auf eindiffundierten Lithiumniobat Wellenleitern mit zusätzlicher Taperschicht aus Silizium betrachtet. Um die Wellenausbreitung in diesen 3-D Wellenleitern zu beschreiben, wird eine einseitig gerichtete Finite-Elemente „Modal Matching“ Methode eingeführt. Abschließend werden Rippenwellenleiter aus Lithiumniobat analysiert, die auf Siliziumdioxid Plattformen aufgebracht sind. Der Schwerpunkt liegt hier auf dem nichtlinearen „Parametric Down-Conversion“ Prozess, der für die Erzeugung verschränkter Photonen verwendet wird."},{"text":"In this work, the electromagnetic wave propagation in integrated optical waveguides is studied by using semi-analytical and numerical simulation methods. In the first part, 2-D high-index contrast Si/SiO2 dielectric slab waveguide configurations are investigated. The structures are excited with semi-guided waves at oblique angles of propagation. Due to this, power transfer to specific outgoing modes can be suppressed, resulting in completely lossless configurations. The excitation is further examined for incoming, laterally confined wave bundles of semi-guided waves to realize practically more relevant 3-D configurations. Additionally, a stepwise angular spectrum method in combination with full vectorial 2-D finite element solutions for subproblems of lower complexity to numerically simulate the wave propagation in full 3-D planar lens-like waveguides is presented. In the second part, the wave propagation in lithium niobate waveguide structures is examined, which are used for quantum optical effects. On the one hand, superconducting nanowires on titanium in-diffused lithium niobate waveguides with an additional tapered silicon layer are used for single photon detection. The wave propagation in these 3-D multiscale tapers is studied by introducing a unidirectional finite element modal matching method. On the other hand, lithium niobate rib waveguides on silicon dioxide platforms are analyzed, focusing on the nonlinear parametric down-conversion process used for the generation of entangled photons.","lang":"eng"}],"author":[{"first_name":"Lena","last_name":"Ebers","id":"40428","full_name":"Ebers, Lena"}],"supervisor":[{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"}],"date_created":"2022-03-29T18:42:08Z","date_updated":"2022-03-29T18:44:30Z","doi":"10.17619/UNIPB/1-1288","title":"Semi-guided waves in integrated optical waveguide structures","citation":{"short":"L. Ebers, Semi-Guided Waves in Integrated Optical Waveguide Structures, 2022.","mla":"Ebers, Lena. <i>Semi-Guided Waves in Integrated Optical Waveguide Structures</i>. 2022, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1288\">10.17619/UNIPB/1-1288</a>.","bibtex":"@book{Ebers_2022, title={Semi-guided waves in integrated optical waveguide structures}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1288\">10.17619/UNIPB/1-1288</a>}, author={Ebers, Lena}, year={2022} }","ama":"Ebers L. <i>Semi-Guided Waves in Integrated Optical Waveguide Structures</i>.; 2022. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1288\">10.17619/UNIPB/1-1288</a>","apa":"Ebers, L. (2022). <i>Semi-guided waves in integrated optical waveguide structures</i>. <a href=\"https://doi.org/10.17619/UNIPB/1-1288\">https://doi.org/10.17619/UNIPB/1-1288</a>","ieee":"L. Ebers, <i>Semi-guided waves in integrated optical waveguide structures</i>. 2022.","chicago":"Ebers, Lena. <i>Semi-Guided Waves in Integrated Optical Waveguide Structures</i>, 2022. <a href=\"https://doi.org/10.17619/UNIPB/1-1288\">https://doi.org/10.17619/UNIPB/1-1288</a>."},"year":"2022"},{"volume":4,"date_created":"2022-03-07T09:51:50Z","author":[{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"full_name":"Ferreri, Alessandro","id":"65609","last_name":"Ferreri","first_name":"Alessandro"},{"last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"last_name":"Albert","full_name":"Albert, Maximilian","first_name":"Maximilian"},{"orcid":"https://orcid.org/0000-0002-3787-3572","last_name":"Meier","full_name":"Meier, Cedrik","id":"20798","first_name":"Cedrik"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"},{"last_name":"Sharapova","id":"60286","full_name":"Sharapova, Polina R.","first_name":"Polina R."}],"publisher":"IOP Publishing","date_updated":"2025-12-16T11:31:04Z","doi":"10.1088/2515-7647/ac5a5b","title":"Flexible source of correlated photons based on LNOI rib waveguides","related_material":{"link":[{"description":"Corrigendum for table C1","relation":"erratum","url":"https://doi.org/10.1088/2515-7647/acc70c"}]},"publication_identifier":{"issn":["2515-7647"]},"publication_status":"published","intvolume":"         4","page":"025001","citation":{"apa":"Ebers, L., Ferreri, A., Hammer, M., Albert, M., Meier, C., Förstner, J., &#38; Sharapova, P. R. (2022). Flexible source of correlated photons based on LNOI rib waveguides. <i>Journal of Physics: Photonics</i>, <i>4</i>, 025001. <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">https://doi.org/10.1088/2515-7647/ac5a5b</a>","short":"L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 025001.","bibtex":"@article{Ebers_Ferreri_Hammer_Albert_Meier_Förstner_Sharapova_2022, title={Flexible source of correlated photons based on LNOI rib waveguides}, volume={4}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Ebers, Lena and Ferreri, Alessandro and Hammer, Manfred and Albert, Maximilian and Meier, Cedrik and Förstner, Jens and Sharapova, Polina R.}, year={2022}, pages={025001} }","mla":"Ebers, Lena, et al. “Flexible Source of Correlated Photons Based on LNOI Rib Waveguides.” <i>Journal of Physics: Photonics</i>, vol. 4, IOP Publishing, 2022, p. 025001, doi:<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>.","ama":"Ebers L, Ferreri A, Hammer M, et al. Flexible source of correlated photons based on LNOI rib waveguides. <i>Journal of Physics: Photonics</i>. 2022;4:025001. doi:<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>","chicago":"Ebers, Lena, Alessandro Ferreri, Manfred Hammer, Maximilian Albert, Cedrik Meier, Jens Förstner, and Polina R. Sharapova. “Flexible Source of Correlated Photons Based on LNOI Rib Waveguides.” <i>Journal of Physics: Photonics</i> 4 (2022): 025001. <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">https://doi.org/10.1088/2515-7647/ac5a5b</a>.","ieee":"L. Ebers <i>et al.</i>, “Flexible source of correlated photons based on LNOI rib waveguides,” <i>Journal of Physics: Photonics</i>, vol. 4, p. 025001, 2022, doi: <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>."},"year":"2022","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"287"},{"_id":"35"},{"_id":"34"}],"user_id":"16199","_id":"30210","project":[{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"},{"name":"TRR 142 - C2: TRR 142 - Subproject C2","_id":"72"},{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"}],"language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"publication":"Journal of Physics: Photonics","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"Lithium niobate on insulator (LNOI) has a great potential for photonic integrated circuits, providing substantial versatility in design of various integrated components. To properly use these components in the implementation of different quantum protocols, photons with different properties are required. In this paper, we theoretically demonstrate a flexible source of correlated photons built on the LNOI waveguide of a special geometry. This source is based on the parametric down-conversion (PDC) process, in which the signal and idler photons are generated at the telecom wavelength and have different spatial profiles and polarizations, but the same group velocities. Distinguishability in polarizations and spatial profiles facilitates the routing and manipulating individual photons, while the equality of their group velocities leads to the absence of temporal walk-off between photons. We show how the spectral properties of the generated photons and the number of their frequency modes can be controlled depending on the pump characteristics and the waveguide length. Finally, we discuss special regimes, in which narrowband light with strong frequency correlations and polarization-entangled Bell states are generated at the telecom wavelength."}]},{"status":"public","type":"journal_article","file_date_updated":"2021-04-30T11:59:16Z","department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","_id":"21932","project":[{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"intvolume":"        38","page":"1717","citation":{"short":"M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 38 (2021) 1717.","mla":"Hammer, Manfred, et al. “Resonant Evanescent Excitation of Guided Waves with High-Order Optical Angular Momentum.” <i>Journal of the Optical Society of America B</i>, vol. 38, no. 5, 2021, p. 1717, doi:<a href=\"https://doi.org/10.1364/josab.422731\">10.1364/josab.422731</a>.","bibtex":"@article{Hammer_Ebers_Förstner_2021, title={Resonant evanescent excitation of guided waves with high-order optical angular momentum}, volume={38}, DOI={<a href=\"https://doi.org/10.1364/josab.422731\">10.1364/josab.422731</a>}, number={5}, journal={Journal of the Optical Society of America B}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2021}, pages={1717} }","apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2021). Resonant evanescent excitation of guided waves with high-order optical angular momentum. <i>Journal of the Optical Society of America B</i>, <i>38</i>(5), 1717. <a href=\"https://doi.org/10.1364/josab.422731\">https://doi.org/10.1364/josab.422731</a>","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation of Guided Waves with High-Order Optical Angular Momentum.” <i>Journal of the Optical Society of America B</i> 38, no. 5 (2021): 1717. <a href=\"https://doi.org/10.1364/josab.422731\">https://doi.org/10.1364/josab.422731</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of guided waves with high-order optical angular momentum,” <i>Journal of the Optical Society of America B</i>, vol. 38, no. 5, p. 1717, 2021.","ama":"Hammer M, Ebers L, Förstner J. Resonant evanescent excitation of guided waves with high-order optical angular momentum. <i>Journal of the Optical Society of America B</i>. 2021;38(5):1717. doi:<a href=\"https://doi.org/10.1364/josab.422731\">10.1364/josab.422731</a>"},"has_accepted_license":"1","publication_identifier":{"issn":["0740-3224","1520-8540"]},"publication_status":"published","doi":"10.1364/josab.422731","volume":38,"author":[{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","id":"48077","full_name":"Hammer, Manfred"},{"full_name":"Ebers, Lena","id":"40428","last_name":"Ebers","first_name":"Lena"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"oa":"1","date_updated":"2022-01-06T06:55:20Z","file":[{"date_created":"2021-04-30T11:57:14Z","creator":"fossie","date_updated":"2021-04-30T11:57:14Z","access_level":"open_access","file_id":"21933","file_name":"oamex.pdf","file_size":1963211,"content_type":"application/pdf","relation":"main_file"},{"creator":"fossie","date_created":"2021-04-30T11:59:16Z","date_updated":"2021-04-30T11:59:16Z","file_id":"21934","file_name":"2021-04 Hammer - JOSA B - Resonant evanescent excitation of guides waves with high-order angular momentum.pdf","embargo":"2022-05-01","access_level":"local","file_size":7750006,"content_type":"application/pdf","embargo_to":"open_access","relation":"main_file"}],"abstract":[{"lang":"eng","text":"Gaussian-beam-like bundles of semi-guided waves propagating in a dielectric slab can excite modes with high-order optical angular momentum supported by a circular fiber. We consider a multimode step-index fiber with a high-index coating, where the waves in the slab are evanescently coupled to the modes of the fiber. Conditions for effective resonant interaction are identified. Based on a hybrid analytical–numerical coupled mode model, our simulations predict that substantial fractions of the input power can be focused into waves with specific orbital angular momentum, of excellent purity, with a clear distinction between degenerate modes with opposite vorticity."}],"publication":"Journal of the Optical Society of America B","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguides"],"ddc":["530"],"year":"2021","issue":"5","title":"Resonant evanescent excitation of guided waves with high-order optical angular momentum","date_created":"2021-04-30T11:54:03Z"},{"keyword":["tet_topic_waveguide"],"ddc":["530"],"language":[{"iso":"eng"}],"publication":"OSA Continuum","abstract":[{"lang":"eng","text":"We show that narrow trenches in a high-contrast silicon-photonics slab can act as lossless power dividers for semi-guided waves. Reflectance and transmittance can be easily configured by selecting the trench width. At sufficiently high angles of incidence, the devices are lossless, apart from material attenuation and scattering due to surface roughness. We numerically simulate a series of devices within the full 0-to-1-range of splitting ratios, for semi-guided plane wave incidence as well as for excitation by focused Gaussian wave bundles. Straightforward cascading of the trenches leads to concepts for 1×M-power dividers and a polarization beam splitter."}],"file":[{"content_type":"application/pdf","relation":"main_file","creator":"fossie","date_created":"2021-11-30T20:07:53Z","date_updated":"2021-11-30T20:19:15Z","file_id":"28197","access_level":"open_access","file_name":"2021-11 Hammer - OSA Continuum - Trenches.pdf","file_size":6618403}],"date_created":"2021-11-30T20:04:57Z","title":"Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics","issue":"12","year":"2021","_id":"28196","project":[{"_id":"53","name":"TRR 142"},{"_id":"56","name":"TRR 142 - Project Area C"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"477","file_date_updated":"2021-11-30T20:19:15Z","type":"journal_article","status":"public","date_updated":"2022-11-18T09:58:03Z","oa":"1","volume":4,"author":[{"full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"doi":"10.1364/osac.437549","publication_identifier":{"issn":["2578-7519"]},"has_accepted_license":"1","publication_status":"published","intvolume":"         4","page":"3081","citation":{"apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2021). Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics. <i>OSA Continuum</i>, <i>4</i>(12), 3081. <a href=\"https://doi.org/10.1364/osac.437549\">https://doi.org/10.1364/osac.437549</a>","short":"M. Hammer, L. Ebers, J. Förstner, OSA Continuum 4 (2021) 3081.","mla":"Hammer, Manfred, et al. “Configurable Lossless Broadband Beam Splitters for Semi-Guided Waves in Integrated Silicon Photonics.” <i>OSA Continuum</i>, vol. 4, no. 12, 2021, p. 3081, doi:<a href=\"https://doi.org/10.1364/osac.437549\">10.1364/osac.437549</a>.","bibtex":"@article{Hammer_Ebers_Förstner_2021, title={Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics}, volume={4}, DOI={<a href=\"https://doi.org/10.1364/osac.437549\">10.1364/osac.437549</a>}, number={12}, journal={OSA Continuum}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2021}, pages={3081} }","ama":"Hammer M, Ebers L, Förstner J. Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics. <i>OSA Continuum</i>. 2021;4(12):3081. doi:<a href=\"https://doi.org/10.1364/osac.437549\">10.1364/osac.437549</a>","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Configurable Lossless Broadband Beam Splitters for Semi-Guided Waves in Integrated Silicon Photonics.” <i>OSA Continuum</i> 4, no. 12 (2021): 3081. <a href=\"https://doi.org/10.1364/osac.437549\">https://doi.org/10.1364/osac.437549</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics,” <i>OSA Continuum</i>, vol. 4, no. 12, p. 3081, 2021, doi: <a href=\"https://doi.org/10.1364/osac.437549\">10.1364/osac.437549</a>."}},{"year":"2021","date_created":"2021-09-03T08:04:06Z","title":"Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides","publication":"Journal of Physics: Photonics","abstract":[{"lang":"eng","text":"We demonstrate the integration of amorphous tungsten silicide superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides. We show proof-of-principle detection of evanescently coupled photons of 1550 nm wavelength using bidirectional waveguide coupling for two orthogonal polarization directions. We investigate the internal detection efficiency as well as detector absorption using coupling-independent characterization measurements. Furthermore, we describe strategies to improve the yield and efficiency of these devices."}],"file":[{"content_type":"application/pdf","relation":"main_file","creator":"fossie","date_created":"2021-09-07T07:41:04Z","date_updated":"2021-09-07T07:41:04Z","file_id":"23825","access_level":"open_access","file_name":"2021-07 Höpker J._Phys._Photonics_3_034022.pdf","file_size":1097820}],"ddc":["530"],"language":[{"iso":"eng"}],"has_accepted_license":"1","publication_identifier":{"issn":["2515-7647"]},"publication_status":"published","intvolume":"         3","page":"034022","citation":{"mla":"Höpker, Jan Philipp, et al. “Integrated Superconducting Nanowire Single-Photon Detectors on Titanium in-Diffused Lithium Niobate Waveguides.” <i>Journal of Physics: Photonics</i>, vol. 3, 2021, p. 034022, doi:<a href=\"https://doi.org/10.1088/2515-7647/ac105b\">10.1088/2515-7647/ac105b</a>.","short":"J.P. Höpker, V.B. Verma, M. Protte, R. Ricken, V. Quiring, C. Eigner, L. Ebers, M. Hammer, J. Förstner, C. Silberhorn, R.P. Mirin, S. Woo Nam, T. Bartley, Journal of Physics: Photonics 3 (2021) 034022.","bibtex":"@article{Höpker_Verma_Protte_Ricken_Quiring_Eigner_Ebers_Hammer_Förstner_Silberhorn_et al._2021, title={Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides}, volume={3}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ac105b\">10.1088/2515-7647/ac105b</a>}, journal={Journal of Physics: Photonics}, author={Höpker, Jan Philipp and Verma, Varun B and Protte, Maximilian and Ricken, Raimund and Quiring, Viktor and Eigner, Christof and Ebers, Lena and Hammer, Manfred and Förstner, Jens and Silberhorn, Christine and et al.}, year={2021}, pages={034022} }","apa":"Höpker, J. P., Verma, V. B., Protte, M., Ricken, R., Quiring, V., Eigner, C., Ebers, L., Hammer, M., Förstner, J., Silberhorn, C., Mirin, R. P., Woo Nam, S., &#38; Bartley, T. (2021). Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides. <i>Journal of Physics: Photonics</i>, <i>3</i>, 034022. <a href=\"https://doi.org/10.1088/2515-7647/ac105b\">https://doi.org/10.1088/2515-7647/ac105b</a>","ama":"Höpker JP, Verma VB, Protte M, et al. Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides. <i>Journal of Physics: Photonics</i>. 2021;3:034022. doi:<a href=\"https://doi.org/10.1088/2515-7647/ac105b\">10.1088/2515-7647/ac105b</a>","chicago":"Höpker, Jan Philipp, Varun B Verma, Maximilian Protte, Raimund Ricken, Viktor Quiring, Christof Eigner, Lena Ebers, et al. “Integrated Superconducting Nanowire Single-Photon Detectors on Titanium in-Diffused Lithium Niobate Waveguides.” <i>Journal of Physics: Photonics</i> 3 (2021): 034022. <a href=\"https://doi.org/10.1088/2515-7647/ac105b\">https://doi.org/10.1088/2515-7647/ac105b</a>.","ieee":"J. P. Höpker <i>et al.</i>, “Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides,” <i>Journal of Physics: Photonics</i>, vol. 3, p. 034022, 2021, doi: <a href=\"https://doi.org/10.1088/2515-7647/ac105b\">10.1088/2515-7647/ac105b</a>."},"oa":"1","date_updated":"2022-10-25T07:34:42Z","volume":3,"author":[{"last_name":"Höpker","id":"33913","full_name":"Höpker, Jan Philipp","first_name":"Jan Philipp"},{"last_name":"Verma","full_name":"Verma, Varun B","first_name":"Varun B"},{"first_name":"Maximilian","last_name":"Protte","full_name":"Protte, Maximilian","id":"46170"},{"first_name":"Raimund","last_name":"Ricken","full_name":"Ricken, Raimund"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244","full_name":"Eigner, Christof"},{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","id":"48077"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"first_name":"Richard P","last_name":"Mirin","full_name":"Mirin, Richard P"},{"first_name":"Sae","full_name":"Woo Nam, Sae","last_name":"Woo Nam"},{"id":"49683","full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim"}],"doi":"10.1088/2515-7647/ac105b","type":"journal_article","status":"public","_id":"23728","project":[{"_id":"53","name":"TRR 142"}],"department":[{"_id":"15"},{"_id":"61"},{"_id":"230"}],"user_id":"49683","article_type":"original","file_date_updated":"2021-09-07T07:41:04Z"},{"status":"public","type":"journal_article","file_date_updated":"2020-10-24T08:11:40Z","article_number":"472","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"project":[{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C5","_id":"75"},{"_id":"53","name":"TRR 142"}],"_id":"20189","citation":{"short":"M. Hammer, L. Ebers, J. Förstner, Optical and Quantum Electronics 52 (2020).","mla":"Hammer, Manfred, et al. “Hybrid Coupled Mode Modelling of the Evanescent Excitation of a Dielectric Tube by Semi-Guided Waves at Oblique Angles.” <i>Optical and Quantum Electronics</i>, vol. 52, 472, 2020, doi:<a href=\"https://doi.org/10.1007/s11082-020-02595-z\">10.1007/s11082-020-02595-z</a>.","bibtex":"@article{Hammer_Ebers_Förstner_2020, title={Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles}, volume={52}, DOI={<a href=\"https://doi.org/10.1007/s11082-020-02595-z\">10.1007/s11082-020-02595-z</a>}, number={472}, journal={Optical and Quantum Electronics}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2020} }","apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2020). Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles. <i>Optical and Quantum Electronics</i>, <i>52</i>. <a href=\"https://doi.org/10.1007/s11082-020-02595-z\">https://doi.org/10.1007/s11082-020-02595-z</a>","ama":"Hammer M, Ebers L, Förstner J. Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles. <i>Optical and Quantum Electronics</i>. 2020;52. doi:<a href=\"https://doi.org/10.1007/s11082-020-02595-z\">10.1007/s11082-020-02595-z</a>","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Hybrid Coupled Mode Modelling of the Evanescent Excitation of a Dielectric Tube by Semi-Guided Waves at Oblique Angles.” <i>Optical and Quantum Electronics</i> 52 (2020). <a href=\"https://doi.org/10.1007/s11082-020-02595-z\">https://doi.org/10.1007/s11082-020-02595-z</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles,” <i>Optical and Quantum Electronics</i>, vol. 52, 2020."},"intvolume":"        52","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0306-8919","1572-817X"]},"doi":"10.1007/s11082-020-02595-z","author":[{"orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"first_name":"Lena","last_name":"Ebers","id":"40428","full_name":"Ebers, Lena"},{"id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"}],"volume":52,"date_updated":"2022-01-06T06:54:22Z","file":[{"content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2020-10-24T08:11:40Z","date_created":"2020-10-24T08:11:40Z","creator":"fossie","file_size":2212769,"file_name":"2020-10 Hammer - OQE - Hybrid Coupled Mode Modelling Dielectric Tube.pdf","file_id":"20190","access_level":"closed"}],"abstract":[{"lang":"eng","text":"A dielectric step-index optical fiber with tube-like profile is considered, being positioned with a small gap on top of a dielectric slab waveguide. We propose a 2.5-D hybrid analytical/numerical coupled mode model for the evanescent excitation of the tube through semi-guided waves propagating in the slab at oblique angles. The model combines the directional polarized modes supported by the slab with analytic solutions for the TE-, TM-, and orbital-angular-momentum (OAM) modes of the tube-shaped fiber. Implementational details of the scheme are discussed, complemented by finite-element simulations for verification purposes. Our results include configurations with resonant in-fiber excitation of OAM modes with large orbital angular momentum and strong field enhancement."}],"publication":"Optical and Quantum Electronics","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_waveguides"],"year":"2020","title":"Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles","date_created":"2020-10-24T08:03:58Z"},{"date_created":"2020-11-17T09:52:47Z","title":"Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method","issue":"24","year":"2020","keyword":["tet_topic_waveguides"],"language":[{"iso":"eng"}],"publication":"Optics Express","abstract":[{"text":"A stepwise angular spectrum method (SASM) for curved interfaces is presented to calculate the wave propagation in planar lens-like integrated optical structures based on photonic slab waveguides. The method is derived and illustrated for an effective 2D setup first and then for 3D slab waveguide lenses. We employ slab waveguides of different thicknesses connected by curved surfaces to realize a lens-like structure. To simulate the wave propagation in 3D including reflection and scattering losses, the stepwise angular spectrum method is combined with full vectorial finite element computations for subproblems with lower complexity. Our SASM results show excellent agreement with rigorous numerical simulations of the full structures with a substantially lower computational effort and can be utilized for the simulation-based design and optimization of complex and large scale setups.","lang":"eng"}],"date_updated":"2022-01-06T06:54:26Z","author":[{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348"},{"id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"}],"volume":28,"doi":"10.1364/oe.409612","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"citation":{"ama":"Ebers L, Hammer M, Förstner J. Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method. <i>Optics Express</i>. 2020;28(24):36361. doi:<a href=\"https://doi.org/10.1364/oe.409612\">10.1364/oe.409612</a>","ieee":"L. Ebers, M. Hammer, and J. Förstner, “Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method,” <i>Optics Express</i>, vol. 28, no. 24, p. 36361, 2020.","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Light Diffraction in Slab Waveguide Lenses Simulated with the Stepwise Angular Spectrum Method.” <i>Optics Express</i> 28, no. 24 (2020): 36361. <a href=\"https://doi.org/10.1364/oe.409612\">https://doi.org/10.1364/oe.409612</a>.","mla":"Ebers, Lena, et al. “Light Diffraction in Slab Waveguide Lenses Simulated with the Stepwise Angular Spectrum Method.” <i>Optics Express</i>, vol. 28, no. 24, 2020, p. 36361, doi:<a href=\"https://doi.org/10.1364/oe.409612\">10.1364/oe.409612</a>.","short":"L. Ebers, M. Hammer, J. Förstner, Optics Express 28 (2020) 36361.","bibtex":"@article{Ebers_Hammer_Förstner_2020, title={Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method}, volume={28}, DOI={<a href=\"https://doi.org/10.1364/oe.409612\">10.1364/oe.409612</a>}, number={24}, journal={Optics Express}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2020}, pages={36361} }","apa":"Ebers, L., Hammer, M., &#38; Förstner, J. (2020). Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method. <i>Optics Express</i>, <i>28</i>(24), 36361. <a href=\"https://doi.org/10.1364/oe.409612\">https://doi.org/10.1364/oe.409612</a>"},"page":"36361","intvolume":"        28","project":[{"_id":"53","name":"TRR 142"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"74","name":"TRR 142 - Subproject C4"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"20372","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"type":"journal_article","status":"public"},{"citation":{"apa":"Protte, M., Ebers, L., Hammer, M., Höpker, J. P., Albert, M., Quiring, V., Meier, C., Förstner, J., Silberhorn, C., &#38; Bartley, T. (2020). Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics. <i>OSA Quantum 2.0 Conference</i>, Article QTh7A.8. <a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">https://doi.org/10.1364/quantum.2020.qth7a.8</a>","bibtex":"@inproceedings{Protte_Ebers_Hammer_Höpker_Albert_Quiring_Meier_Förstner_Silberhorn_Bartley_2020, title={Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics}, DOI={<a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">10.1364/quantum.2020.qth7a.8</a>}, number={QTh7A.8}, booktitle={OSA Quantum 2.0 Conference}, author={Protte, Maximilian and Ebers, Lena and Hammer, Manfred and Höpker, Jan Philipp and Albert, Maximilian and Quiring, Viktor and Meier, Cedrik and Förstner, Jens and Silberhorn, Christine and Bartley, Tim}, year={2020} }","mla":"Protte, Maximilian, et al. “Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics.” <i>OSA Quantum 2.0 Conference</i>, QTh7A.8, 2020, doi:<a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">10.1364/quantum.2020.qth7a.8</a>.","short":"M. Protte, L. Ebers, M. Hammer, J.P. Höpker, M. Albert, V. Quiring, C. Meier, J. Förstner, C. Silberhorn, T. Bartley, in: OSA Quantum 2.0 Conference, 2020.","ama":"Protte M, Ebers L, Hammer M, et al. Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics. In: <i>OSA Quantum 2.0 Conference</i>. ; 2020. doi:<a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">10.1364/quantum.2020.qth7a.8</a>","ieee":"M. Protte <i>et al.</i>, “Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics,” 2020, doi: <a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">10.1364/quantum.2020.qth7a.8</a>.","chicago":"Protte, Maximilian, Lena Ebers, Manfred Hammer, Jan Philipp Höpker, Maximilian Albert, Viktor Quiring, Cedrik Meier, Jens Förstner, Christine Silberhorn, and Tim Bartley. “Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics.” In <i>OSA Quantum 2.0 Conference</i>, 2020. <a href=\"https://doi.org/10.1364/quantum.2020.qth7a.8\">https://doi.org/10.1364/quantum.2020.qth7a.8</a>."},"has_accepted_license":"1","publication_identifier":{"isbn":["9781943580811"]},"publication_status":"published","doi":"10.1364/quantum.2020.qth7a.8","date_updated":"2022-10-25T07:41:15Z","author":[{"last_name":"Protte","full_name":"Protte, Maximilian","id":"46170","first_name":"Maximilian"},{"first_name":"Lena","full_name":"Ebers, Lena","id":"40428","last_name":"Ebers"},{"first_name":"Manfred","full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"first_name":"Jan Philipp","full_name":"Höpker, Jan Philipp","id":"33913","last_name":"Höpker"},{"first_name":"Maximilian","full_name":"Albert, Maximilian","last_name":"Albert"},{"full_name":"Quiring, Viktor","last_name":"Quiring","first_name":"Viktor"},{"first_name":"Cedrik","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik","id":"20798"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"first_name":"Tim","last_name":"Bartley","id":"49683","full_name":"Bartley, Tim"}],"status":"public","type":"conference","article_number":"QTh7A.8","file_date_updated":"2021-04-22T15:58:52Z","_id":"21719","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"}],"user_id":"49683","year":"2020","title":"Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics","date_created":"2021-04-22T15:56:45Z","abstract":[{"text":"We fabricate silicon tapers to increase the mode overlap of superconducting detectors on Ti:LiNbO3 waveguides. Mode images show a reduction in mode size from 6 µm to 2 µm FWHM, agreeing with beam propagation simulations.","lang":"eng"}],"file":[{"content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2021-04-22T15:58:52Z","creator":"fossie","date_created":"2021-04-22T15:58:52Z","file_size":1704199,"file_name":"Quantum2.0-Towards SSC hybrid integration for quantum photonics[4936].pdf","file_id":"21720","access_level":"closed"}],"publication":"OSA Quantum 2.0 Conference","keyword":["tet_topic_waveguide"],"ddc":["530"],"language":[{"iso":"eng"}]},{"year":"2019","date_created":"2019-08-09T07:07:45Z","title":"Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating","publication":"Journal of the Optical Society of America B","file":[{"relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_id":"12909","file_name":"2019-07 Hammer - JOSA B - Oblique Quasi-Lossless Excitation of a Thin Silicon Slab Waveguide (preprint).pdf","file_size":728533,"date_created":"2019-08-09T07:09:04Z","creator":"fossie","date_updated":"2019-08-09T07:09:04Z"}],"ddc":["530"],"keyword":["tet_topic_waveguides"],"language":[{"iso":"eng"}],"publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0740-3224","1520-8540"]},"citation":{"chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Oblique Quasi-Lossless Excitation of a Thin Silicon Slab Waveguide: A Guided-Wave Variant of an Anti-Reflection Coating.” <i>Journal of the Optical Society of America B</i> 36 (2019): 2395. <a href=\"https://doi.org/10.1364/josab.36.002395\">https://doi.org/10.1364/josab.36.002395</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating,” <i>Journal of the Optical Society of America B</i>, vol. 36, p. 2395, 2019.","ama":"Hammer M, Ebers L, Förstner J. Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating. <i>Journal of the Optical Society of America B</i>. 2019;36:2395. doi:<a href=\"https://doi.org/10.1364/josab.36.002395\">10.1364/josab.36.002395</a>","apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2019). Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating. <i>Journal of the Optical Society of America B</i>, <i>36</i>, 2395. <a href=\"https://doi.org/10.1364/josab.36.002395\">https://doi.org/10.1364/josab.36.002395</a>","short":"M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 36 (2019) 2395.","mla":"Hammer, Manfred, et al. “Oblique Quasi-Lossless Excitation of a Thin Silicon Slab Waveguide: A Guided-Wave Variant of an Anti-Reflection Coating.” <i>Journal of the Optical Society of America B</i>, vol. 36, 2019, p. 2395, doi:<a href=\"https://doi.org/10.1364/josab.36.002395\">10.1364/josab.36.002395</a>.","bibtex":"@article{Hammer_Ebers_Förstner_2019, title={Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating}, volume={36}, DOI={<a href=\"https://doi.org/10.1364/josab.36.002395\">10.1364/josab.36.002395</a>}, journal={Journal of the Optical Society of America B}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2019}, pages={2395} }"},"page":"2395","intvolume":"        36","oa":"1","date_updated":"2022-01-06T06:51:24Z","author":[{"orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"first_name":"Lena","last_name":"Ebers","full_name":"Ebers, Lena","id":"40428"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"volume":36,"doi":"10.1364/josab.36.002395","type":"journal_article","status":"public","project":[{"name":"TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"_id":"12908","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"file_date_updated":"2019-08-09T07:09:04Z"},{"title":"Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter","date_created":"2019-11-15T07:21:20Z","year":"2019","keyword":["tet_topic_waveguides"],"ddc":["530"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"We investigate optical microresonators consisting of either one or two coupled rectangular strips between upper and lower slab waveguides. The cavities are evanescently excited under oblique angles by thin-film guided, in-plane unguided waves supported by one of the slab waveguides. Beyond a specific incidence angle, losses are fully suppressed. The interaction between the guided mode of the cavity-strip and the incoming slab modes leads to resonant behavior for specific incidence angles and gaps. For a single cavity, at resonance, the input power is equally split among each of the four output ports, while for two cavities an add-drop filter can be realized that, at resonance, routes the incoming power completely to the forward drop waveguide via the cavity. For both applications, the strength of the interaction is controlled by the gaps between cavities and waveguides."}],"file":[{"date_updated":"2019-11-15T15:33:26Z","creator":"fossie","date_created":"2019-11-15T15:33:26Z","file_size":882779,"file_name":"2019-11-12 Ebers - Add Drop Filter - OSA continuum (official version).pdf","file_id":"15012","access_level":"open_access","content_type":"application/pdf","relation":"main_file"}],"publication":"OSA Continuum","doi":"10.1364/osac.2.003288","main_file_link":[{"open_access":"1","url":"https://www.osapublishing.org/osac/abstract.cfm?uri=osac-2-11-3288"}],"date_updated":"2022-01-06T06:52:13Z","oa":"1","volume":2,"author":[{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"last_name":"Berkemeier","full_name":"Berkemeier, Manuel B.","first_name":"Manuel B."},{"full_name":"Menzel, Alexander","last_name":"Menzel","first_name":"Alexander"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"}],"page":"3288","intvolume":"         2","citation":{"mla":"Ebers, Lena, et al. “Coupled Microstrip-Cavities under Oblique Incidence of Semi-Guided Waves: A Lossless Integrated Optical Add-Drop Filter.” <i>OSA Continuum</i>, vol. 2, 2019, p. 3288, doi:<a href=\"https://doi.org/10.1364/osac.2.003288\">10.1364/osac.2.003288</a>.","short":"L. Ebers, M. Hammer, M.B. Berkemeier, A. Menzel, J. Förstner, OSA Continuum 2 (2019) 3288.","bibtex":"@article{Ebers_Hammer_Berkemeier_Menzel_Förstner_2019, title={Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter}, volume={2}, DOI={<a href=\"https://doi.org/10.1364/osac.2.003288\">10.1364/osac.2.003288</a>}, journal={OSA Continuum}, author={Ebers, Lena and Hammer, Manfred and Berkemeier, Manuel B. and Menzel, Alexander and Förstner, Jens}, year={2019}, pages={3288} }","apa":"Ebers, L., Hammer, M., Berkemeier, M. B., Menzel, A., &#38; Förstner, J. (2019). Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter. <i>OSA Continuum</i>, <i>2</i>, 3288. <a href=\"https://doi.org/10.1364/osac.2.003288\">https://doi.org/10.1364/osac.2.003288</a>","ama":"Ebers L, Hammer M, Berkemeier MB, Menzel A, Förstner J. Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter. <i>OSA Continuum</i>. 2019;2:3288. doi:<a href=\"https://doi.org/10.1364/osac.2.003288\">10.1364/osac.2.003288</a>","ieee":"L. Ebers, M. Hammer, M. B. Berkemeier, A. Menzel, and J. Förstner, “Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter,” <i>OSA Continuum</i>, vol. 2, p. 3288, 2019.","chicago":"Ebers, Lena, Manfred Hammer, Manuel B. Berkemeier, Alexander Menzel, and Jens Förstner. “Coupled Microstrip-Cavities under Oblique Incidence of Semi-Guided Waves: A Lossless Integrated Optical Add-Drop Filter.” <i>OSA Continuum</i> 2 (2019): 3288. <a href=\"https://doi.org/10.1364/osac.2.003288\">https://doi.org/10.1364/osac.2.003288</a>."},"publication_identifier":{"issn":["2578-7519"]},"has_accepted_license":"1","publication_status":"published","file_date_updated":"2019-11-15T15:33:26Z","_id":"14990","project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","status":"public","type":"journal_article"},{"abstract":[{"lang":"ger","text":"Die Erfindung betrifft einen optischen Übergang zwischen zwei optischen Schichtwellenleitern. Dazu ist eine Anordnung vorgesehen aus einem ersten optischen Schichtwellenleiter (2) und einem zweiten optischen Schichtwellenleiter (3), wobei der erste optische Schichtwellenleiter (2) und der zweite optische Schichtwellenleiter (3) voneinander verschiedene über ihre jeweilige Länge konstante Dicken (d, r) aufweisen, der erste optische Schichtwellenleiter (2) mit dem zweiten optischen Schichtwellenleiter (3) mittels einer optischen Schichtwellenleiterstruktur (4) verbunden ist, die über ihre gesamte Länge (w) eine Dicke (h) aufweist, die zwischen der Dicke (d) des ersten optischen Schichtwellenleiters (2) und der Dicke (r) des zweiten optischen Schichtwellenleiters (3) liegt. Erfindungsgemäß ist die Dicke (h) der optischen Schichtwellenleiterstruktur (4) über die gesamte Länge (w) der optischen Schichtwellenleiterstruktur (4) konstant. Damit wird eine Möglichkeit für einen effizienten und mit geringen Verlusten behafteten Übergang zwischen zwei optischen Schichtwellenleitern mit unterschiedlicher Dicke bereitgestellt. "},{"lang":"eng","text":"The invention relates to an optical junction between two optical planar waveguides. For this purpose, an arrangement is provided of a first optical layer waveguide (2) and a second optical slab waveguide (3), wherein the first optical layer waveguide (2) and the second optical slab waveguide (3) different from each other is constant over their respective length of thicknesses (d, r ) which the first optical layer waveguide (2) with the second optical film waveguide (3) (by means of an optical layer waveguide structure 4) is connected, which (along their entire length w) has a thickness (h) which is between the thickness (d) the first optical waveguide layer (2) and the thickness (r) of the second optical waveguide layer (3). According to the invention, the thickness (h) of the optical layer waveguide structure (4) over the entire length (w) of the optical layer waveguide structure (4) constant. Thus, a possibility for an efficient and entailing low loss transition between two optical planar waveguides is provided with different thickness."}],"file":[{"file_id":"7721","access_level":"closed","file_name":"2019-01-31 DE-Patentschrift_5349.pdf","file_size":155604,"date_created":"2019-02-15T10:21:08Z","creator":"fossie","date_updated":"2019-02-15T10:21:08Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"keyword":["tet_topic_waveguides"],"ddc":["530"],"publication_date":"2019-01-31","year":"2019","application_date":"2018-04-05","title":"Optical transition between two optical waveguides layer and method for transmitting light","date_created":"2019-02-15T10:25:59Z","status":"public","type":"patent","file_date_updated":"2019-02-15T10:21:08Z","_id":"7720","project":[{"name":"TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","page":"9","citation":{"ama":"Hammer M, Förstner J, Ebers L. Optical transition between two optical waveguides layer and method for transmitting light. Published online 2019.","ieee":"M. Hammer, J. Förstner, and L. Ebers, “Optical transition between two optical waveguides layer and method for transmitting light.” 2019.","chicago":"Hammer, Manfred, Jens Förstner, and Lena Ebers. “Optical Transition between Two Optical Waveguides Layer and Method for Transmitting Light,” 2019.","apa":"Hammer, M., Förstner, J., &#38; Ebers, L. (2019). <i>Optical transition between two optical waveguides layer and method for transmitting light</i>.","short":"M. Hammer, J. Förstner, L. Ebers, (2019).","mla":"Hammer, Manfred, et al. <i>Optical Transition between Two Optical Waveguides Layer and Method for Transmitting Light</i>. 2019.","bibtex":"@article{Hammer_Förstner_Ebers_2019, title={Optical transition between two optical waveguides layer and method for transmitting light}, author={Hammer, Manfred and Förstner, Jens and Ebers, Lena}, year={2019} }"},"has_accepted_license":"1","ipn":"DE102018108110B3","application_number":"102018108110","main_file_link":[{"url":"https://patents.google.com/patent/DE102018108110B3/en"}],"ipc":"G02B 6/26","date_updated":"2022-04-27T07:35:46Z","author":[{"full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"last_name":"Ebers","full_name":"Ebers, Lena","id":"40428","first_name":"Lena"}]},{"type":"journal_article","publication":"Optics Express","file":[{"creator":"nprante","date_created":"2019-03-27T13:47:50Z","date_updated":"2019-03-27T13:47:50Z","file_id":"8714","access_level":"closed","file_name":"oe-27-7-9313.pdf","file_size":2388537,"content_type":"application/pdf","relation":"main_file","success":1}],"status":"public","abstract":[{"lang":"eng","text":"A rectangular dielectric strip at some distance above an optical slab waveguide is\r\nbeing considered, for evanescent excitation of the strip through the semi-guided waves supported\r\nby the slab, at specific oblique angles. The 2.5-D configuration shows resonant transmission\r\nproperties with respect to variations of the angle of incidence, or of the excitation frequency,\r\nrespectively. The strength of the interaction can be controlled by the gap between strip and slab.\r\nFor increasing distance, our simulations predict resonant states with unit extremal reflectance\r\nof an angular or spectral width that tends to zero, i.e. resonances with a Q-factor that tends\r\nto infinity, while the resonance position approaches the level of the guided mode of the strip.\r\nThis exceptionally simple system realizes what might be termed a “bound state coupled to the\r\ncontinuum”."}],"user_id":"158","department":[{"_id":"61"}],"_id":"8634","language":[{"iso":"eng"}],"file_date_updated":"2019-03-27T13:47:50Z","ddc":["600"],"article_type":"original","keyword":["tet_topic_waveguides"],"issue":"7","has_accepted_license":"1","citation":{"apa":"Hammer, M., Ebers, L., &#38; Förstner, J. (2019). Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q. <i>Optics Express</i>, <i>27</i>(7), 8. <a href=\"https://doi.org/10.1364/OE.27.009313\">https://doi.org/10.1364/OE.27.009313</a>","mla":"Hammer, Manfred, et al. “Oblique Evanescent Excitation of a Dielectric Strip: A Model Resonator with an Open Optical Cavity of Unlimited Q.” <i>Optics Express</i>, vol. 27, no. 7, 2019, p. 8, doi:<a href=\"https://doi.org/10.1364/OE.27.009313\">10.1364/OE.27.009313</a>.","short":"M. Hammer, L. Ebers, J. Förstner, Optics Express 27 (2019) 8.","bibtex":"@article{Hammer_Ebers_Förstner_2019, title={Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q}, volume={27}, DOI={<a href=\"https://doi.org/10.1364/OE.27.009313\">10.1364/OE.27.009313</a>}, number={7}, journal={Optics Express}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2019}, pages={8} }","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Oblique Evanescent Excitation of a Dielectric Strip: A Model Resonator with an Open Optical Cavity of Unlimited Q.” <i>Optics Express</i> 27, no. 7 (2019): 8. <a href=\"https://doi.org/10.1364/OE.27.009313\">https://doi.org/10.1364/OE.27.009313</a>.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q,” <i>Optics Express</i>, vol. 27, no. 7, p. 8, 2019, doi: <a href=\"https://doi.org/10.1364/OE.27.009313\">10.1364/OE.27.009313</a>.","ama":"Hammer M, Ebers L, Förstner J. Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q. <i>Optics Express</i>. 2019;27(7):8. doi:<a href=\"https://doi.org/10.1364/OE.27.009313\">10.1364/OE.27.009313</a>"},"page":"8","intvolume":"        27","year":"2019","date_created":"2019-03-26T10:39:00Z","author":[{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","id":"48077","full_name":"Hammer, Manfred"},{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"volume":27,"date_updated":"2023-01-03T10:34:29Z","doi":"10.1364/OE.27.009313","title":"Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q"},{"has_accepted_license":"1","publication_status":"published","page":"18621-18632","intvolume":"        26","citation":{"ama":"Ebers L, Hammer M, Förstner J. Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. <i>Optics Express</i>. 2018;26(14):18621-18632. doi:<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>","ieee":"L. Ebers, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges,” <i>Optics Express</i>, vol. 26, no. 14, pp. 18621–18632, 2018.","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” <i>Optics Express</i> 26, no. 14 (2018): 18621–32. <a href=\"https://doi.org/10.1364/OE.26.018621\">https://doi.org/10.1364/OE.26.018621</a>.","apa":"Ebers, L., Hammer, M., &#38; Förstner, J. (2018). Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. <i>Optics Express</i>, <i>26</i>(14), 18621–18632. <a href=\"https://doi.org/10.1364/OE.26.018621\">https://doi.org/10.1364/OE.26.018621</a>","mla":"Ebers, Lena, et al. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” <i>Optics Express</i>, vol. 26, no. 14, OSA Publishing, 2018, pp. 18621–32, doi:<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>.","bibtex":"@article{Ebers_Hammer_Förstner_2018, title={Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges}, volume={26}, DOI={<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>}, number={14}, journal={Optics Express}, publisher={OSA Publishing}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2018}, pages={18621–18632} }","short":"L. Ebers, M. Hammer, J. Förstner, Optics Express 26 (2018) 18621–18632."},"volume":26,"author":[{"first_name":"Lena","last_name":"Ebers","id":"40428","full_name":"Ebers, Lena"},{"orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred","first_name":"Manfred"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"date_updated":"2022-01-06T06:59:33Z","oa":"1","doi":"10.1364/OE.26.018621","type":"journal_article","status":"public","urn":"37409","department":[{"_id":"61"}],"user_id":"158","_id":"3740","project":[{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"file_date_updated":"2018-08-01T09:30:58Z","article_type":"letter_note","issue":"14","year":"2018","date_created":"2018-08-01T09:31:03Z","publisher":"OSA Publishing","title":"Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges","publication":"Optics Express","file":[{"relation":"main_file","content_type":"application/pdf","file_size":6193865,"access_level":"open_access","file_name":"2018-07 Ebers_Hammer_Förstner_OpticsExpress_Oblique incidence of semi guided planar waves on slab waveguide steps_Rounded Edges.pdf","file_id":"3741","date_updated":"2018-08-01T09:30:58Z","creator":"hclaudia","date_created":"2018-08-01T09:30:58Z"}],"abstract":[{"text":"Oblique propagation of semi-guided waves across slab waveguide structures with bent corners is investigated. A critical angle can be defined beyond which all radiation losses are suppressed. Additionally an increase of the curvature radius of the bends also leads to low-loss configurations for incidence angles below that critical angle. A combination of two bent corner systems represents a step-like structure, behaving like a Fabry-Perot interferometer, with two partial reflectors separated by the vertical height between the horizontal slabs. We numerically analyse typical high-index-contrast Si/SiO2 structures for their reflectance and transmittance properties. When increasing the curvature radius the resonant effect becomes less relevant such that full transmittance is reached with less critical conditions on the vertical distance or the incidence angle. For practical interest 3-D problems are considered, where the structures are excited by the fundamental mode of a wide, shallow rib waveguide. High transmittance levels can be observed also for these 3-D configurations depending on the width of the rib.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["620"]},{"publication":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","file":[{"file_size":242956,"file_name":"2018-09 Hammer - MMET (final draft).pdf","file_id":"4580","access_level":"closed","date_updated":"2018-10-02T17:13:55Z","date_created":"2018-10-02T17:13:55Z","creator":"fossie","success":1,"relation":"main_file","content_type":"application/pdf"}],"abstract":[{"lang":"eng","text":"Semi-guided waves confined in dielectric slab waveguides are being considered for oblique angles of propagation. If the waves encounter a linear discontinuity of (mostly) arbitrary shape and extension, a variant of Snell's law applies, separately for each pair of incoming and outgoing modes. Depending on the effective indices involved, and on the angle of incidence, power transfer to specific outgoing waves can be allowed or forbidden. In particular, critical angles of incidence can be identified, beyond which any power transfer to non-guided waves is forbidden, i.e. all radiative losses are suppressed. In that case the input power is carried away from the discontinuity exclusively by reflected semi-guided waves in the input slab, or by semi-guided waves that are transmitted into other outgoing slab waveguides. Vectorial equations on a 2-D cross sectional domain apply. These are formally identical to the equations that govern the eigenmodes of 3-D channel waveguides. Here, however, these need to be solved not as an eigenvalue problem, but as an inhomogeneous problem with a right-hand-side that is given by the incoming semi-guided wave, and subject to transparent boundary conditions. The equations resemble a standard 2-D Helmholtz problem, with an effective permittivity in place of the actual relative permittivity. Depending on the properties of the incoming wave, including the angle of incidence, this effective permittivity can become locally negative, causing the suppression of propagating outgoing waves. A series of high-contrast example configurations are discussed, where these effects lead to - in some respects - quite surprising transmission characteristics."}],"keyword":["tet_topic_waveguides"],"ddc":["530"],"year":"2018","date_created":"2018-10-02T17:11:59Z","publisher":"IEEE","title":"Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity","type":"conference","status":"public","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"4579","project":[{"name":"TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"75","name":"TRR 142 - Subproject C5"}],"file_date_updated":"2018-10-02T17:13:55Z","has_accepted_license":"1","publication_identifier":{"isbn":["9781538654385"]},"publication_status":"published","citation":{"apa":"Hammer, M., Ebers, L., Hildebrandt, A., Alhaddad, S., &#38; Förstner, J. (2018). Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE. <a href=\"https://doi.org/10.1109/mmet.2018.8460455\">https://doi.org/10.1109/mmet.2018.8460455</a>","short":"M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, J. Förstner, in: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), IEEE, 2018.","bibtex":"@inproceedings{Hammer_Ebers_Hildebrandt_Alhaddad_Förstner_2018, title={Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity}, DOI={<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>}, booktitle={2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)}, publisher={IEEE}, author={Hammer, Manfred and Ebers, Lena and Hildebrandt, Andre and Alhaddad, Samer and Förstner, Jens}, year={2018} }","mla":"Hammer, Manfred, et al. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>, IEEE, 2018, doi:<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>.","chicago":"Hammer, Manfred, Lena Ebers, Andre Hildebrandt, Samer Alhaddad, and Jens Förstner. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” In <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE, 2018. <a href=\"https://doi.org/10.1109/mmet.2018.8460455\">https://doi.org/10.1109/mmet.2018.8460455</a>.","ieee":"M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, and J. Förstner, “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity,” in <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>, 2018.","ama":"Hammer M, Ebers L, Hildebrandt A, Alhaddad S, Förstner J. Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In: <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE; 2018. doi:<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>"},"author":[{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","id":"48077"},{"first_name":"Lena","full_name":"Ebers, Lena","id":"40428","last_name":"Ebers"},{"first_name":"Andre","last_name":"Hildebrandt","full_name":"Hildebrandt, Andre"},{"last_name":"Alhaddad","id":"42456","full_name":"Alhaddad, Samer","first_name":"Samer"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"date_updated":"2022-01-06T07:01:13Z","doi":"10.1109/mmet.2018.8460455"},{"doi":"10.1007/s11082-017-1011-x","date_updated":"2022-01-06T06:59:39Z","volume":49,"author":[{"first_name":"Lena","id":"40428","full_name":"Ebers, Lena","last_name":"Ebers"},{"id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"page":"49:176","intvolume":"        49","citation":{"ama":"Ebers L, Hammer M, Förstner J. Spiral modes supported by circular dielectric tubes and tube segments. <i>Optical and Quantum Electronics</i>. 2017;49(4):49:176. doi:<a href=\"https://doi.org/10.1007/s11082-017-1011-x\">10.1007/s11082-017-1011-x</a>","ieee":"L. Ebers, M. Hammer, and J. Förstner, “Spiral modes supported by circular dielectric tubes and tube segments,” <i>Optical and Quantum Electronics</i>, vol. 49, no. 4, p. 49:176, 2017.","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Spiral Modes Supported by Circular Dielectric Tubes and Tube Segments.” <i>Optical and Quantum Electronics</i> 49, no. 4 (2017): 49:176. <a href=\"https://doi.org/10.1007/s11082-017-1011-x\">https://doi.org/10.1007/s11082-017-1011-x</a>.","apa":"Ebers, L., Hammer, M., &#38; Förstner, J. (2017). Spiral modes supported by circular dielectric tubes and tube segments. <i>Optical and Quantum Electronics</i>, <i>49</i>(4), 49:176. <a href=\"https://doi.org/10.1007/s11082-017-1011-x\">https://doi.org/10.1007/s11082-017-1011-x</a>","short":"L. Ebers, M. Hammer, J. Förstner, Optical and Quantum Electronics 49 (2017) 49:176.","bibtex":"@article{Ebers_Hammer_Förstner_2017, title={Spiral modes supported by circular dielectric tubes and tube segments}, volume={49}, DOI={<a href=\"https://doi.org/10.1007/s11082-017-1011-x\">10.1007/s11082-017-1011-x</a>}, number={4}, journal={Optical and Quantum Electronics}, publisher={Springer Nature}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2017}, pages={49:176} }","mla":"Ebers, Lena, et al. “Spiral Modes Supported by Circular Dielectric Tubes and Tube Segments.” <i>Optical and Quantum Electronics</i>, vol. 49, no. 4, Springer Nature, 2017, p. 49:176, doi:<a href=\"https://doi.org/10.1007/s11082-017-1011-x\">10.1007/s11082-017-1011-x</a>."},"has_accepted_license":"1","publication_identifier":{"issn":["0306-8919","1572-817X"]},"publication_status":"published","article_type":"original","file_date_updated":"2022-01-06T06:59:38Z","_id":"3830","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"62","name":"TRR 142 - Subproject A5"}],"department":[{"_id":"61"}],"user_id":"158","urn":"38308","status":"public","type":"journal_article","title":"Spiral modes supported by circular dielectric tubes and tube segments","publisher":"Springer Nature","date_created":"2018-08-07T09:52:20Z","year":"2017","issue":"4","keyword":["tet_topic_waveguide"],"ddc":["530"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The modal properties of curved dielectric slab waveguides are investigated. We\r\nconsider quasi-confined, attenuated modes that propagate at oblique angles with respect to\r\nthe axis through the center of curvature. Our analytical model describes the transition from\r\nscalar 2-D TE/TM bend modes to lossless spiral waves at near-axis propagation angles,\r\nwith a continuum of vectorial attenuated spiral modes in between. Modal solutions are\r\ncharacterized in terms of directional wavenumbers and attenuation constants. Examples for\r\nvectorial mode profiles illustrate the effects of oblique wave propagation along the curved\r\nslab segments. For the regime of lossless spiral waves, the relation with the guided modes\r\nof corresponding dielectric tubes is demonstrated."}],"file":[{"date_updated":"2022-01-06T06:59:38Z","creator":"hclaudia","date_created":"2018-08-07T09:56:27Z","file_size":2379736,"access_level":"request","file_id":"3831","file_name":"2017-03 Ebers, Hammer_Spiral modes supported by circular dielectric tubes and tube segments.pdf","content_type":"application/pdf","relation":"main_file"}],"publication":"Optical and Quantum Electronics"}]