[{"publication_status":"published","publication_identifier":{"issn":["2159-3930"]},"issue":"12","year":"2023","citation":{"ama":"Zhang B, Plidschun M, Schmidt MA, Kitzerow H-S. Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing. <i>Optical Materials Express</i>. 2023;13(12). doi:<a href=\"https://doi.org/10.1364/ome.503100\">10.1364/ome.503100</a>","ieee":"B. Zhang, M. Plidschun, M. A. Schmidt, and H.-S. Kitzerow, “Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing,” <i>Optical Materials Express</i>, vol. 13, no. 12, Art. no. 3467, 2023, doi: <a href=\"https://doi.org/10.1364/ome.503100\">10.1364/ome.503100</a>.","chicago":"Zhang, Bingru, Malte Plidschun, Markus A. Schmidt, and Heinz-Siegfried Kitzerow. “Anchoring and Electro-Optic Switching of Liquid Crystals on Nano-Structured Surfaces Fabricated by Two-Photon Based Nano-Printing.” <i>Optical Materials Express</i> 13, no. 12 (2023). <a href=\"https://doi.org/10.1364/ome.503100\">https://doi.org/10.1364/ome.503100</a>.","bibtex":"@article{Zhang_Plidschun_Schmidt_Kitzerow_2023, title={Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing}, volume={13}, DOI={<a href=\"https://doi.org/10.1364/ome.503100\">10.1364/ome.503100</a>}, number={123467}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Zhang, Bingru and Plidschun, Malte and Schmidt, Markus A. and Kitzerow, Heinz-Siegfried}, year={2023} }","mla":"Zhang, Bingru, et al. “Anchoring and Electro-Optic Switching of Liquid Crystals on Nano-Structured Surfaces Fabricated by Two-Photon Based Nano-Printing.” <i>Optical Materials Express</i>, vol. 13, no. 12, 3467, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/ome.503100\">10.1364/ome.503100</a>.","short":"B. Zhang, M. Plidschun, M.A. Schmidt, H.-S. Kitzerow, Optical Materials Express 13 (2023).","apa":"Zhang, B., Plidschun, M., Schmidt, M. A., &#38; Kitzerow, H.-S. (2023). Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing. <i>Optical Materials Express</i>, <i>13</i>(12), Article 3467. <a href=\"https://doi.org/10.1364/ome.503100\">https://doi.org/10.1364/ome.503100</a>"},"intvolume":"        13","publisher":"Optica Publishing Group","date_updated":"2023-12-13T16:06:29Z","author":[{"first_name":"Bingru","last_name":"Zhang","full_name":"Zhang, Bingru"},{"last_name":"Plidschun","full_name":"Plidschun, Malte","first_name":"Malte"},{"full_name":"Schmidt, Markus A.","last_name":"Schmidt","first_name":"Markus A."},{"first_name":"Heinz-Siegfried","id":"254","full_name":"Kitzerow, Heinz-Siegfried","last_name":"Kitzerow"}],"date_created":"2023-12-13T15:59:37Z","volume":13,"title":"Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing","doi":"10.1364/ome.503100","type":"journal_article","publication":"Optical Materials Express","abstract":[{"lang":"eng","text":"<jats:p>The alignment of liquid crystals on surfaces plays a central role in optimizing their performances. In this work, a cutting-edge nano-lithography-based method to control the local orientation of a thermotropic liquid crystal is applied to easily available commercial standard materials and evaluated. Parallel nanogrooves on a substrate, created through 3D nanoprinting in a negative-tone photoresin optimized for two-photon polymerization are used for this purpose. Azimuthal anchoring energies of the order from 10<jats:sup>−6</jats:sup> J/m<jats:sup>2</jats:sup> to 10<jats:sup>−5</jats:sup> J/m<jats:sup>2</jats:sup> are found, depending on the spacing, width and depth of the grooves. In part, these values are larger than those reported previously for another photopolymer. Both uniform alignment and spatial patterns of different alignment directions can be realized. Electro-optic studies confirm the suitability of the method for electrically addressable photonic applications and indicate strong polar anchoring.</jats:p>"}],"status":"public","_id":"49609","user_id":"254","department":[{"_id":"313"},{"_id":"230"},{"_id":"35"}],"article_number":"3467","keyword":["Electronic","Optical and Magnetic Materials"],"language":[{"iso":"eng"}]},{"article_number":"2997","language":[{"iso":"eng"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"_id":"61266","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"706"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"623"}],"abstract":[{"text":"<jats:p>This review examines the use of continuous-variable spectroscopy techniques for investigating quantum coherence and light-matter interactions in semiconductor systems with ultrafast dynamics. Special emphasis is placed on multichannel homodyne detection as a powerful tool to measure the quantum coherence and the full density matrix of a polariton system. Observations, such as coherence times that exceed the nanosecond scale obtained by monitoring the temporal decay of quantum coherence in a polariton condensate, are discussed. Proof-of-concept experiments and numerical simulations that demonstrate the enhanced resourcefulness of the produced system states for modern quantum protocols are assessed. The combination of tailored resource quantifiers and ultrafast spectroscopy techniques that have recently been demonstrated paves the way for future applications of quantum information technologies.</jats:p>","lang":"eng"}],"status":"public","type":"journal_article","publication":"Optical Materials Express","title":"Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]","doi":"10.1364/ome.497006","date_updated":"2025-09-12T11:41:42Z","publisher":"Optica Publishing Group","date_created":"2025-09-12T11:40:26Z","author":[{"first_name":"Carolin","full_name":"Lüders, Carolin","last_name":"Lüders"},{"first_name":"Franziska","full_name":"Barkhausen, Franziska","id":"63631","last_name":"Barkhausen"},{"first_name":"Matthias","last_name":"Pukrop","full_name":"Pukrop, Matthias"},{"full_name":"Rozas, Elena","last_name":"Rozas","first_name":"Elena"},{"full_name":"Sperling, Jan","id":"75127","last_name":"Sperling","orcid":"0000-0002-5844-3205","first_name":"Jan"},{"full_name":"Schumacher, Stefan","id":"27271","orcid":"0000-0003-4042-4951","last_name":"Schumacher","first_name":"Stefan"},{"last_name":"Aßmann","full_name":"Aßmann, Marc","first_name":"Marc"}],"volume":13,"year":"2023","citation":{"bibtex":"@article{Lüders_Barkhausen_Pukrop_Rozas_Sperling_Schumacher_Aßmann_2023, title={Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]}, volume={13}, DOI={<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>}, number={112997}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Lüders, Carolin and Barkhausen, Franziska and Pukrop, Matthias and Rozas, Elena and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2023} }","short":"C. Lüders, F. Barkhausen, M. Pukrop, E. Rozas, J. Sperling, S. Schumacher, M. Aßmann, Optical Materials Express 13 (2023).","mla":"Lüders, Carolin, et al. “Continuous-Variable Quantum Optics and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical Materials Express</i>, vol. 13, no. 11, 2997, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>.","apa":"Lüders, C., Barkhausen, F., Pukrop, M., Rozas, E., Sperling, J., Schumacher, S., &#38; Aßmann, M. (2023). Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]. <i>Optical Materials Express</i>, <i>13</i>(11), Article 2997. <a href=\"https://doi.org/10.1364/ome.497006\">https://doi.org/10.1364/ome.497006</a>","chicago":"Lüders, Carolin, Franziska Barkhausen, Matthias Pukrop, Elena Rozas, Jan Sperling, Stefan Schumacher, and Marc Aßmann. “Continuous-Variable Quantum Optics and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical Materials Express</i> 13, no. 11 (2023). <a href=\"https://doi.org/10.1364/ome.497006\">https://doi.org/10.1364/ome.497006</a>.","ieee":"C. Lüders <i>et al.</i>, “Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited],” <i>Optical Materials Express</i>, vol. 13, no. 11, Art. no. 2997, 2023, doi: <a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>.","ama":"Lüders C, Barkhausen F, Pukrop M, et al. Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]. <i>Optical Materials Express</i>. 2023;13(11). doi:<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>"},"intvolume":"        13","publication_status":"published","publication_identifier":{"issn":["2159-3930"]},"issue":"11"},{"language":[{"iso":"eng"}],"abstract":[{"text":"With the rapid advances of functional dielectric metasurfaces and their integration on on-chip nanophotonic devices, the necessity of metasurfaces working in different environments, especially in biological applications, arose. However, the metasurfaces’ performance is tied to the unit cell’s efficiency and ultimately the surrounding environment it was designed for, thus reducing its applicability if exposed to altering refractive index media. Here, we report a method to increase a metasurface’s versatility by covering the high-index metasurface with a low index porous SiO2 film, protecting the metasurface from environmental changes while keeping the working efficiency unchanged. We show, that a covered metasurface retains its functionality even when exposed to fluidic environments.","lang":"eng"}],"publication":"Optical Materials Express","title":"Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions","publisher":"Optica","date_created":"2021-12-02T18:47:42Z","year":"2022","quality_controlled":"1","issue":"1","article_type":"original","_id":"28254","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"2"},{"_id":"35"},{"_id":"307"}],"user_id":"23547","status":"public","type":"journal_article","doi":"10.1364/ome.444264","main_file_link":[{"url":"https://www.osapublishing.org/ome/fulltext.cfm?uri=ome-12-1-13&id=465602","open_access":"1"}],"oa":"1","date_updated":"2023-03-08T08:13:58Z","volume":12,"author":[{"last_name":"Geromel","full_name":"Geromel, René","first_name":"René"},{"first_name":"Christian","last_name":"Weinberger","id":"11848","full_name":"Weinberger, Christian"},{"full_name":"Brormann, Katja","last_name":"Brormann","first_name":"Katja"},{"first_name":"Michael","full_name":"Tiemann, Michael","id":"23547","last_name":"Tiemann","orcid":"0000-0003-1711-2722"},{"first_name":"Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","full_name":"Zentgraf, Thomas","id":"30525"}],"intvolume":"        12","page":"13-21","citation":{"ama":"Geromel R, Weinberger C, Brormann K, Tiemann M, Zentgraf T. Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions. <i>Optical Materials Express</i>. 2022;12(1):13-21. doi:<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>","ieee":"R. Geromel, C. Weinberger, K. Brormann, M. Tiemann, and T. Zentgraf, “Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions,” <i>Optical Materials Express</i>, vol. 12, no. 1, pp. 13–21, 2022, doi: <a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>.","chicago":"Geromel, René, Christian Weinberger, Katja Brormann, Michael Tiemann, and Thomas Zentgraf. “Porous SiO2 Coated Dielectric Metasurface with Consistent Performance Independent of Environmental Conditions.” <i>Optical Materials Express</i> 12, no. 1 (2022): 13–21. <a href=\"https://doi.org/10.1364/ome.444264\">https://doi.org/10.1364/ome.444264</a>.","apa":"Geromel, R., Weinberger, C., Brormann, K., Tiemann, M., &#38; Zentgraf, T. (2022). Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions. <i>Optical Materials Express</i>, <i>12</i>(1), 13–21. <a href=\"https://doi.org/10.1364/ome.444264\">https://doi.org/10.1364/ome.444264</a>","short":"R. Geromel, C. Weinberger, K. Brormann, M. Tiemann, T. Zentgraf, Optical Materials Express 12 (2022) 13–21.","mla":"Geromel, René, et al. “Porous SiO2 Coated Dielectric Metasurface with Consistent Performance Independent of Environmental Conditions.” <i>Optical Materials Express</i>, vol. 12, no. 1, Optica, 2022, pp. 13–21, doi:<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>.","bibtex":"@article{Geromel_Weinberger_Brormann_Tiemann_Zentgraf_2022, title={Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions}, volume={12}, DOI={<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>}, number={1}, journal={Optical Materials Express}, publisher={Optica}, author={Geromel, René and Weinberger, Christian and Brormann, Katja and Tiemann, Michael and Zentgraf, Thomas}, year={2022}, pages={13–21} }"},"publication_identifier":{"issn":["2159-3930"]},"publication_status":"published"},{"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"We realize and investigate a nonlinear metasurface taking advantage of intersubband transitions in ultranarrow GaN/AlN multi-quantum well heterostructures. Owing to huge band offsets, the structures offer resonant transitions in the telecom window around 1.55 µm. These heterostructures are functionalized with an array of plasmonic antennas featuring cross-polarized resonances at these near-infrared wavelengths and their second harmonic. This kind of nonlinear metasurface allows for substantial second-harmonic generation at normal incidence which is completely absent for an antenna array without the multi-quantum well structure underneath. While the second harmonic is originally radiated only into the plane of the quantum wells, a proper geometrical arrangement of the plasmonic elements permits the redirection of the second-harmonic light to free-space radiation, which is emitted perpendicular to the surface."}],"publication":"Optical Materials Express","title":"Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays","date_created":"2021-06-16T05:52:21Z","publisher":"OSA","year":"2021","issue":"7","quality_controlled":"1","article_number":"2134","article_type":"original","user_id":"30525","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"429"}],"project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"65","name":"TRR 142 - Subproject A8"}],"_id":"22450","status":"public","type":"journal_article","main_file_link":[{"open_access":"1","url":"https://www.osapublishing.org/ome/fulltext.cfm?uri=ome-11-7-2134&id=452008"}],"doi":"10.1364/ome.426236","author":[{"last_name":"Mundry","full_name":"Mundry, Jan","first_name":"Jan"},{"first_name":"Florian","full_name":"Spreyer, Florian","last_name":"Spreyer"},{"first_name":"Valentin","last_name":"Jmerik","full_name":"Jmerik, Valentin"},{"full_name":"Ivanov, Sergey","last_name":"Ivanov","first_name":"Sergey"},{"orcid":"0000-0002-8662-1101","last_name":"Zentgraf","id":"30525","full_name":"Zentgraf, Thomas","first_name":"Thomas"},{"last_name":"Betz","full_name":"Betz, Markus","first_name":"Markus"}],"volume":11,"date_updated":"2022-01-06T06:55:33Z","oa":"1","citation":{"bibtex":"@article{Mundry_Spreyer_Jmerik_Ivanov_Zentgraf_Betz_2021, title={Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays}, volume={11}, DOI={<a href=\"https://doi.org/10.1364/ome.426236\">10.1364/ome.426236</a>}, number={72134}, journal={Optical Materials Express}, publisher={OSA}, author={Mundry, Jan and Spreyer, Florian and Jmerik, Valentin and Ivanov, Sergey and Zentgraf, Thomas and Betz, Markus}, year={2021} }","mla":"Mundry, Jan, et al. “Nonlinear Metasurface Combining Telecom-Range Intersubband Transitions in GaN/AlN Quantum Wells with Resonant Plasmonic Antenna Arrays.” <i>Optical Materials Express</i>, vol. 11, no. 7, 2134, OSA, 2021, doi:<a href=\"https://doi.org/10.1364/ome.426236\">10.1364/ome.426236</a>.","short":"J. Mundry, F. Spreyer, V. Jmerik, S. Ivanov, T. Zentgraf, M. Betz, Optical Materials Express 11 (2021).","apa":"Mundry, J., Spreyer, F., Jmerik, V., Ivanov, S., Zentgraf, T., &#38; Betz, M. (2021). Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays. <i>Optical Materials Express</i>, <i>11</i>(7). <a href=\"https://doi.org/10.1364/ome.426236\">https://doi.org/10.1364/ome.426236</a>","ieee":"J. Mundry, F. Spreyer, V. Jmerik, S. Ivanov, T. Zentgraf, and M. Betz, “Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays,” <i>Optical Materials Express</i>, vol. 11, no. 7, 2021.","chicago":"Mundry, Jan, Florian Spreyer, Valentin Jmerik, Sergey Ivanov, Thomas Zentgraf, and Markus Betz. “Nonlinear Metasurface Combining Telecom-Range Intersubband Transitions in GaN/AlN Quantum Wells with Resonant Plasmonic Antenna Arrays.” <i>Optical Materials Express</i> 11, no. 7 (2021). <a href=\"https://doi.org/10.1364/ome.426236\">https://doi.org/10.1364/ome.426236</a>.","ama":"Mundry J, Spreyer F, Jmerik V, Ivanov S, Zentgraf T, Betz M. Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays. <i>Optical Materials Express</i>. 2021;11(7). doi:<a href=\"https://doi.org/10.1364/ome.426236\">10.1364/ome.426236</a>"},"intvolume":"        11","publication_status":"published","publication_identifier":{"issn":["2159-3930"]}},{"status":"public","type":"journal_article","publication":"Optical Materials Express","language":[{"iso":"eng"}],"article_number":"82","user_id":"13244","department":[{"_id":"15"},{"_id":"288"}],"_id":"9681","citation":{"ieee":"M. F. Volk <i>et al.</i>, “Fabrication of low-loss Rb-exchanged ridge waveguides in z-cut KTiOPO_4,” <i>Optical Materials Express</i>, Art. no. 82, 2017, doi: <a href=\"https://doi.org/10.1364/ome.8.000082\">10.1364/ome.8.000082</a>.","chicago":"Volk, Martin F., Christian E. Rüter, Matteo Santandrea, Christof Eigner, Laura Padberg, Harald Herrmann, Christine Silberhorn, and Detlef Kip. “Fabrication of Low-Loss Rb-Exchanged Ridge Waveguides in z-Cut KTiOPO_4.” <i>Optical Materials Express</i>, 2017. <a href=\"https://doi.org/10.1364/ome.8.000082\">https://doi.org/10.1364/ome.8.000082</a>.","ama":"Volk MF, Rüter CE, Santandrea M, et al. Fabrication of low-loss Rb-exchanged ridge waveguides in z-cut KTiOPO_4. <i>Optical Materials Express</i>. Published online 2017. doi:<a href=\"https://doi.org/10.1364/ome.8.000082\">10.1364/ome.8.000082</a>","mla":"Volk, Martin F., et al. “Fabrication of Low-Loss Rb-Exchanged Ridge Waveguides in z-Cut KTiOPO_4.” <i>Optical Materials Express</i>, 82, 2017, doi:<a href=\"https://doi.org/10.1364/ome.8.000082\">10.1364/ome.8.000082</a>.","short":"M.F. Volk, C.E. Rüter, M. Santandrea, C. Eigner, L. Padberg, H. Herrmann, C. Silberhorn, D. Kip, Optical Materials Express (2017).","bibtex":"@article{Volk_Rüter_Santandrea_Eigner_Padberg_Herrmann_Silberhorn_Kip_2017, title={Fabrication of low-loss Rb-exchanged ridge waveguides in z-cut KTiOPO_4}, DOI={<a href=\"https://doi.org/10.1364/ome.8.000082\">10.1364/ome.8.000082</a>}, number={82}, journal={Optical Materials Express}, author={Volk, Martin F. and Rüter, Christian E. and Santandrea, Matteo and Eigner, Christof and Padberg, Laura and Herrmann, Harald and Silberhorn, Christine and Kip, Detlef}, year={2017} }","apa":"Volk, M. F., Rüter, C. E., Santandrea, M., Eigner, C., Padberg, L., Herrmann, H., Silberhorn, C., &#38; Kip, D. (2017). Fabrication of low-loss Rb-exchanged ridge waveguides in z-cut KTiOPO_4. <i>Optical Materials Express</i>, Article 82. <a href=\"https://doi.org/10.1364/ome.8.000082\">https://doi.org/10.1364/ome.8.000082</a>"},"year":"2017","publication_status":"published","publication_identifier":{"issn":["2159-3930"]},"doi":"10.1364/ome.8.000082","title":"Fabrication of low-loss Rb-exchanged ridge waveguides in z-cut KTiOPO_4","date_created":"2019-05-07T14:54:33Z","author":[{"first_name":"Martin F.","last_name":"Volk","full_name":"Volk, Martin F."},{"last_name":"Rüter","full_name":"Rüter, Christian E.","first_name":"Christian E."},{"first_name":"Matteo","orcid":"0000-0001-5718-358X","last_name":"Santandrea","full_name":"Santandrea, Matteo","id":"55095"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"first_name":"Harald","full_name":"Herrmann, Harald","id":"216","last_name":"Herrmann"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"full_name":"Kip, Detlef","last_name":"Kip","first_name":"Detlef"}],"date_updated":"2022-01-06T07:04:18Z"}]