[{"user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"34"},{"_id":"61"},{"_id":"230"},{"_id":"623"},{"_id":"429"}],"project":[{"name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"}],"_id":"64877","language":[{"iso":"eng"}],"type":"journal_article","publication":"arXiv","status":"public","date_created":"2026-03-10T15:37:22Z","author":[{"first_name":"Behnood","last_name":"Taheri","full_name":"Taheri, Behnood"},{"first_name":"Denis","last_name":"Kopylov","id":"98502","full_name":"Kopylov, Denis"},{"id":"48077","full_name":"Hammer, Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"full_name":"Meier, Torsten","id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"},{"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."}],"date_updated":"2026-03-10T15:41:18Z","doi":"10.48550/ARXIV.2603.01656","title":"Gain-induced spectral non-degeneracy in type-II parametric down-conversion","citation":{"apa":"Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., &#38; Sharapova, P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>ArXiv</i>. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>","mla":"Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026, doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","bibtex":"@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced spectral non-degeneracy in type-II parametric down-conversion}, DOI={<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>}, journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }","short":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova, ArXiv (2026).","ama":"Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>arXiv</i>. Published online 2026. doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>","ieee":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova, “Gain-induced spectral non-degeneracy in type-II parametric down-conversion,” <i>arXiv</i>, 2026, doi: <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","chicago":"Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner, and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>."},"year":"2026"},{"status":"public","type":"journal_article","file_date_updated":"2025-10-05T11:48:25Z","_id":"60891","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"citation":{"ama":"Hammer M, Khan S, Taheri B, Farheen H, Förstner J. TFLN channel waveguides of rib and strip type: Properties of guided modes. <i>Optics Continuum</i>. 2025;4(10):2356. doi:<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>","ieee":"M. Hammer, S. Khan, B. Taheri, H. Farheen, and J. Förstner, “TFLN channel waveguides of rib and strip type: Properties of guided modes,” <i>Optics Continuum</i>, vol. 4, no. 10, p. 2356, 2025, doi: <a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>.","chicago":"Hammer, Manfred, Shahriar Khan, Behnood Taheri, Henna Farheen, and Jens Förstner. “TFLN Channel Waveguides of Rib and Strip Type: Properties of Guided Modes.” <i>Optics Continuum</i> 4, no. 10 (2025): 2356. <a href=\"https://doi.org/10.1364/optcon.569959\">https://doi.org/10.1364/optcon.569959</a>.","apa":"Hammer, M., Khan, S., Taheri, B., Farheen, H., &#38; Förstner, J. (2025). TFLN channel waveguides of rib and strip type: Properties of guided modes. <i>Optics Continuum</i>, <i>4</i>(10), 2356. <a href=\"https://doi.org/10.1364/optcon.569959\">https://doi.org/10.1364/optcon.569959</a>","mla":"Hammer, Manfred, et al. “TFLN Channel Waveguides of Rib and Strip Type: Properties of Guided Modes.” <i>Optics Continuum</i>, vol. 4, no. 10, Optica Publishing Group, 2025, p. 2356, doi:<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>.","short":"M. Hammer, S. Khan, B. Taheri, H. Farheen, J. Förstner, Optics Continuum 4 (2025) 2356.","bibtex":"@article{Hammer_Khan_Taheri_Farheen_Förstner_2025, title={TFLN channel waveguides of rib and strip type: Properties of guided modes}, volume={4}, DOI={<a href=\"https://doi.org/10.1364/optcon.569959\">10.1364/optcon.569959</a>}, number={10}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Khan, Shahriar and Taheri, Behnood and Farheen, Henna and Förstner, Jens}, year={2025}, pages={2356} }"},"page":"2356","intvolume":"         4","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["2770-0208"]},"doi":"10.1364/optcon.569959","date_updated":"2025-10-05T11:52:55Z","author":[{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"first_name":"Shahriar","full_name":"Khan, Shahriar","last_name":"Khan"},{"full_name":"Taheri, Behnood","last_name":"Taheri","first_name":"Behnood"},{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","orcid":"0000-0001-7730-3489","last_name":"Farheen"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"volume":4,"abstract":[{"lang":"eng","text":"Straight dielectric waveguide channels made from slabs of thin-film lithium niobate (TFLN), or lithium niobate on insulator (LNOI), are investigated in the linear regime, for channels of rib and strip type with common trapezoidal cross sections, in Z-cut and X-cut samples at varying on-chip orientation. We clarify the theoretical basis for the waveguides with potentially non-diagonal core permittivity. Symmetry classes can be distinguished that differ in their consequences for potential modal degeneracy and polarization conversion. Our rigorous numerical analysis by means of a finite-element solver takes the anisotropy of the lithium niobate cores rigorously into account. We discuss extensive data for effective indices, polarization properties, and hybridization of guided modes, in single- and multimode channels. Scans over the waveguide width and orientation as primary parameters are complemented by a series of illustrations of vectorial mode profiles. These turn out to be essentially complex in cases of X-cut channels at non-crystal-axis-aligned orientations."}],"file":[{"content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2025-10-05T11:48:25Z","creator":"fossie","date_created":"2025-10-05T11:48:25Z","file_size":5417636,"file_name":"2025-08 Hammer - Optics Continuum - TFLN channel waveguides of rib and strip type. Properties of guided modes (official version).pdf","access_level":"closed","file_id":"61516"}],"publication":"Optics Continuum","ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"year":"2025","issue":"10","title":"TFLN channel waveguides of rib and strip type: Properties of guided modes","publisher":"Optica Publishing Group","date_created":"2025-08-06T09:36:30Z"},{"publication":"Optics Express","file":[{"creator":"fossie","date_created":"2024-06-10T11:25:00Z","date_updated":"2024-06-10T11:25:00Z","file_name":"2024-06 Hammer - Optics Express - Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides.pdf","file_id":"54669","access_level":"open_access","file_size":4004782,"content_type":"application/pdf","relation":"main_file"}],"abstract":[{"lang":"eng","text":"Samples of dielectric optical waveguides of rib or strip type in thin-film lithium niobate (TFLN) technology are characterized with respect to their optical loss using the Fabry-Pérot method. Attributing the losses mainly to sidewall roughness, we employ a simple perturbational procedure, based on rigorously computed mode profiles of idealized channels, to estimate the attenuation for waveguides with different cross sections. A single fit parameter suffices for an adequate modelling of the effect of the waveguide geometry on the loss levels."}],"language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_waveguide"],"issue":"13","year":"2024","date_created":"2024-06-10T11:18:06Z","publisher":"Optica Publishing Group","title":"Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides","type":"journal_article","status":"public","user_id":"158","department":[{"_id":"61"},{"_id":"429"},{"_id":"623"},{"_id":"263"},{"_id":"288"}],"project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","grant_number":"231447078"},{"grant_number":"231447078","_id":"175","name":"TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"grant_number":"PROFILNRW-2020-067","_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing"}],"_id":"54668","file_date_updated":"2024-06-10T11:25:00Z","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["1094-4087"]},"citation":{"chicago":"Hammer, Manfred, Silia Babel, Henna Farheen, Laura Padberg, J. Christoph Scheytt, Christine Silberhorn, and Jens Förstner. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” <i>Optics Express</i> 32, no. 13 (2024): 22878. <a href=\"https://doi.org/10.1364/oe.521766\">https://doi.org/10.1364/oe.521766</a>.","ieee":"M. Hammer <i>et al.</i>, “Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides,” <i>Optics Express</i>, vol. 32, no. 13, p. 22878, 2024, doi: <a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>.","ama":"Hammer M, Babel S, Farheen H, et al. Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. <i>Optics Express</i>. 2024;32(13):22878. doi:<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>","apa":"Hammer, M., Babel, S., Farheen, H., Padberg, L., Scheytt, J. C., Silberhorn, C., &#38; Förstner, J. (2024). Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. <i>Optics Express</i>, <i>32</i>(13), 22878. <a href=\"https://doi.org/10.1364/oe.521766\">https://doi.org/10.1364/oe.521766</a>","mla":"Hammer, Manfred, et al. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” <i>Optics Express</i>, vol. 32, no. 13, Optica Publishing Group, 2024, p. 22878, doi:<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>.","bibtex":"@article{Hammer_Babel_Farheen_Padberg_Scheytt_Silberhorn_Förstner_2024, title={Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides}, volume={32}, DOI={<a href=\"https://doi.org/10.1364/oe.521766\">10.1364/oe.521766</a>}, number={13}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Babel, Silia and Farheen, Henna and Padberg, Laura and Scheytt, J. Christoph and Silberhorn, Christine and Förstner, Jens}, year={2024}, pages={22878} }","short":"M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878."},"page":"22878","intvolume":"        32","author":[{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348"},{"full_name":"Babel, Silia","id":"63231","last_name":"Babel","orcid":"https://orcid.org/0000-0002-1568-2580","first_name":"Silia"},{"first_name":"Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489","full_name":"Farheen, Henna","id":"53444"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","full_name":"Scheytt, J. Christoph","id":"37144","first_name":"J. Christoph"},{"last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263","first_name":"Christine"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"volume":32,"oa":"1","date_updated":"2024-07-22T07:43:02Z","doi":"10.1364/oe.521766"},{"date_created":"2024-08-25T10:24:58Z","publisher":"Optica Publishing Group","title":"Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching","issue":"9","year":"2024","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"publication":"Journal of the Optical Society of America B","file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2024-08-25T10:30:28Z","creator":"fossie","date_updated":"2024-08-25T10:30:28Z","file_id":"55752","file_name":"2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching.pdf","access_level":"local","file_size":920206},{"file_name":"2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching (preprint).pdf","access_level":"open_access","file_id":"55753","file_size":931810,"title":"(preprint)","date_created":"2024-08-25T10:48:05Z","creator":"fossie","date_updated":"2024-08-25T10:48:05Z","relation":"main_file","content_type":"application/pdf"}],"abstract":[{"text":"Lateral leakage of TM modes in dielectric optical waveguides of rib/ridge or strip-loaded types can be fully suppressed, if the waveguide core is formed not through a strip that protrudes at one side (up) from the remaining lateral guiding slab, but through parallel strips on both sides (up and down), such that the resulting cross section becomes vertically symmetric. The fairly general arguments underlying the leakage suppression apply to TM modes of all orders simultaneously, and are independent of wavelength. These plus-shaped waveguides support strictly guided, non-leaky TM modes for, in principle, arbitrarily shallow etching.","lang":"eng"}],"volume":41,"author":[{"full_name":"Üstün, Necati","last_name":"Üstün","first_name":"Necati"},{"last_name":"Farheen","orcid":"0000-0001-7730-3489","id":"53444","full_name":"Farheen, Henna","first_name":"Henna"},{"first_name":"Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","id":"48077","full_name":"Hammer, Manfred"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens"}],"oa":"1","date_updated":"2024-08-25T10:48:42Z","doi":"10.1364/josab.528729","publication_identifier":{"issn":["0740-3224","1520-8540"]},"has_accepted_license":"1","publication_status":"published","page":"2077","intvolume":"        41","citation":{"bibtex":"@article{Üstün_Farheen_Hammer_Förstner_2024, title={Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching}, volume={41}, DOI={<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>}, number={9}, journal={Journal of the Optical Society of America B}, publisher={Optica Publishing Group}, author={Üstün, Necati and Farheen, Henna and Hammer, Manfred and Förstner, Jens}, year={2024}, pages={2077} }","mla":"Üstün, Necati, et al. “Symmetry-Protected TM Modes in Rib-like, plus-Shaped Optical Waveguides with Shallow Etching.” <i>Journal of the Optical Society of America B</i>, vol. 41, no. 9, Optica Publishing Group, 2024, p. 2077, doi:<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>.","short":"N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society of America B 41 (2024) 2077.","apa":"Üstün, N., Farheen, H., Hammer, M., &#38; Förstner, J. (2024). Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching. <i>Journal of the Optical Society of America B</i>, <i>41</i>(9), 2077. <a href=\"https://doi.org/10.1364/josab.528729\">https://doi.org/10.1364/josab.528729</a>","ieee":"N. Üstün, H. Farheen, M. Hammer, and J. Förstner, “Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching,” <i>Journal of the Optical Society of America B</i>, vol. 41, no. 9, p. 2077, 2024, doi: <a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>.","chicago":"Üstün, Necati, Henna Farheen, Manfred Hammer, and Jens Förstner. “Symmetry-Protected TM Modes in Rib-like, plus-Shaped Optical Waveguides with Shallow Etching.” <i>Journal of the Optical Society of America B</i> 41, no. 9 (2024): 2077. <a href=\"https://doi.org/10.1364/josab.528729\">https://doi.org/10.1364/josab.528729</a>.","ama":"Üstün N, Farheen H, Hammer M, Förstner J. Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching. <i>Journal of the Optical Society of America B</i>. 2024;41(9):2077. doi:<a href=\"https://doi.org/10.1364/josab.528729\">10.1364/josab.528729</a>"},"department":[{"_id":"61"},{"_id":"429"}],"user_id":"158","_id":"55751","project":[{"_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing","grant_number":"PROFILNRW-2020-067"},{"grant_number":"231447078","_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)"}],"file_date_updated":"2024-08-25T10:48:05Z","article_type":"original","type":"journal_article","status":"public"},{"abstract":[{"text":"Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media are consid-ered, for operation in the linear regime. We outline and implement a largely analytic procedure forrigorous modal analysis of three-layer slabs with birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant TE or TM polarization, and with effective indices that depend on the propagation directionof the modes, relative to the crystal axes. Strong hybridization can be observed for near degeneratemodes in singular configurations without vertical symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same symmetry class. Dispersion curves for slab thickness and propa-gation angle are discussed, for slabs with oxide and air cover. ","lang":"eng"}],"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","access_level":"closed","file_name":"2024-11 Hammer - Optics Continuum - Guided modes of thin-film lithium niobate slabs.pdf","file_id":"56864","file_size":4399685,"date_created":"2024-11-04T17:05:30Z","creator":"fossie","date_updated":"2024-11-04T17:05:30Z"}],"publication":"Optics Continuum","ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"year":"2024","title":"Guided modes of thin-film lithium niobate slabs","publisher":"Optica Publishing Group","date_created":"2024-09-21T09:17:16Z","status":"public","type":"journal_article","file_date_updated":"2024-11-04T17:05:30Z","project":[{"_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing","grant_number":"PROFILNRW-2020-067"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"}],"_id":"56193","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"citation":{"ama":"Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>. Published online 2024:532822. doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>","ieee":"M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium niobate slabs,” <i>Optics Continuum</i>, p. 532822, 2024, doi: <a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>.","chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, 2024, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>.","bibtex":"@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film lithium niobate slabs}, DOI={<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2024}, pages={532822} }","mla":"Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, Optica Publishing Group, 2024, p. 532822, doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>.","short":"M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.","apa":"Hammer, M., Farheen, H., &#38; Förstner, J. (2024). Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>"},"page":"532822","publication_status":"published","publication_identifier":{"issn":["2770-0208"]},"has_accepted_license":"1","doi":"10.1364/optcon.532822","date_updated":"2024-11-04T17:07:27Z","author":[{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348"},{"first_name":"Henna","full_name":"Farheen, Henna","id":"53444","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}]},{"title":"How to suppress radiative losses in high-contrast integrated Bragg gratings","publisher":"Optica Publishing Group","date_created":"2023-03-31T13:04:43Z","year":"2023","issue":"4","keyword":["tet_topic_waveguide"],"ddc":["530"],"language":[{"iso":"eng"}],"abstract":[{"text":"High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated. For specific oblique excitation by semi-guided waves at sufficiently high angles of incidence, the idealized structures do not exhibit any radiative losses, such that reflectance and transmittance for the single port mode add strictly up to one. We consider a series of symmetric, fully and partly etched finite gratings, for parameters found in integrated silicon photonics. These can act as spectral filters with a reasonably flattop response. Apodization can lead to more box shaped reflectance and transmittance spectra. Together with a narrowband Fabry–Perot filter, these configurations are characterized by reflection bands, or transmittance peaks, with widths that span three orders of magnitude.","lang":"eng"}],"file":[{"file_size":1982311,"file_id":"43247","file_name":"ogr-afterreview.pdf","access_level":"open_access","date_updated":"2023-03-31T13:14:59Z","date_created":"2023-03-31T13:14:59Z","creator":"fossie","relation":"main_file","content_type":"application/pdf"}],"publication":"Journal of the Optical Society of America B","doi":"10.1364/josab.485725","oa":"1","date_updated":"2024-07-22T07:44:38Z","volume":40,"author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred"},{"first_name":"Henna","orcid":"0000-0001-7730-3489","last_name":"Farheen","id":"53444","full_name":"Farheen, Henna"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"intvolume":"        40","page":"862","citation":{"chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” <i>Journal of the Optical Society of America B</i> 40, no. 4 (2023): 862. <a href=\"https://doi.org/10.1364/josab.485725\">https://doi.org/10.1364/josab.485725</a>.","ieee":"M. Hammer, H. Farheen, and J. Förstner, “How to suppress radiative losses in high-contrast integrated Bragg gratings,” <i>Journal of the Optical Society of America B</i>, vol. 40, no. 4, p. 862, 2023, doi: <a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>.","ama":"Hammer M, Farheen H, Förstner J. How to suppress radiative losses in high-contrast integrated Bragg gratings. <i>Journal of the Optical Society of America B</i>. 2023;40(4):862. doi:<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>","mla":"Hammer, Manfred, et al. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” <i>Journal of the Optical Society of America B</i>, vol. 40, no. 4, Optica Publishing Group, 2023, p. 862, doi:<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>.","short":"M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.","bibtex":"@article{Hammer_Farheen_Förstner_2023, title={How to suppress radiative losses in high-contrast integrated Bragg gratings}, volume={40}, DOI={<a href=\"https://doi.org/10.1364/josab.485725\">10.1364/josab.485725</a>}, number={4}, journal={Journal of the Optical Society of America B}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2023}, pages={862} }","apa":"Hammer, M., Farheen, H., &#38; Förstner, J. (2023). How to suppress radiative losses in high-contrast integrated Bragg gratings. <i>Journal of the Optical Society of America B</i>, <i>40</i>(4), 862. <a href=\"https://doi.org/10.1364/josab.485725\">https://doi.org/10.1364/josab.485725</a>"},"has_accepted_license":"1","publication_identifier":{"issn":["0740-3224","1520-8540"]},"publication_status":"published","file_date_updated":"2023-03-31T13:14:59Z","_id":"43245","project":[{"_id":"53","name":"TRR 142: TRR 142","grant_number":"231447078"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"grant_number":"231447078","name":"TRR 142 - B06: TRR 142 - Subproject B06","_id":"167"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","status":"public","type":"journal_article"},{"type":"conference","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."},{"first_name":"Halina","full_name":"Rubinsztein-Dunlop, Halina","last_name":"Rubinsztein-Dunlop"}],"status":"public","project":[{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}],"_id":"30387","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"file_date_updated":"2022-03-22T18:03:50Z","publication_status":"published","has_accepted_license":"1","citation":{"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>.","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} }","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>","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>.","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>"},"page":"120170F","oa":"1","date_updated":"2022-03-22T18:04:20Z","author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077"},{"first_name":"Lena","id":"40428","full_name":"Ebers, Lena","last_name":"Ebers"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"doi":"10.1117/12.2612179","publication":"Complex Light and Optical Forces XVI","abstract":[{"lang":"eng","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"}],"file":[{"creator":"fossie","date_created":"2022-03-22T18:03:50Z","date_updated":"2022-03-22T18:03:50Z","file_id":"30444","access_level":"open_access","file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Resonant evanescent excitation of OAM modes in a high-contrast circular (official version).pdf","file_size":2015899,"content_type":"application/pdf","relation":"main_file"}],"ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"year":"2022","publisher":"SPIE","date_created":"2022-03-21T10:12:58Z","title":"Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber"},{"type":"journal_article","status":"public","_id":"35128","user_id":"158","department":[{"_id":"61"},{"_id":"230"}],"file_date_updated":"2023-01-03T09:36:34Z","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0146-9592","1539-4794"]},"citation":{"chicago":"Nikbakht, Hamed, Mohammad Talebi Khoshmehr, Bob van Someren, Dieter Teichrib, Manfred Hammer, Jens Förstner, and B. Imran Akca. “Asymmetric, Non-Uniform 3-DB Directional Coupler with 300-Nm Bandwidth and a Small Footprint.” <i>Optics Letters</i> 48, no. 2 (2022): 207. <a href=\"https://doi.org/10.1364/ol.476537\">https://doi.org/10.1364/ol.476537</a>.","ieee":"H. Nikbakht <i>et al.</i>, “Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint,” <i>Optics Letters</i>, vol. 48, no. 2, p. 207, 2022, doi: <a href=\"https://doi.org/10.1364/ol.476537\">10.1364/ol.476537</a>.","ama":"Nikbakht H, Khoshmehr MT, van Someren B, et al. Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint. <i>Optics Letters</i>. 2022;48(2):207. doi:<a href=\"https://doi.org/10.1364/ol.476537\">10.1364/ol.476537</a>","apa":"Nikbakht, H., Khoshmehr, M. T., van Someren, B., Teichrib, D., Hammer, M., Förstner, J., &#38; Akca, B. I. (2022). Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint. <i>Optics Letters</i>, <i>48</i>(2), 207. <a href=\"https://doi.org/10.1364/ol.476537\">https://doi.org/10.1364/ol.476537</a>","short":"H. Nikbakht, M.T. Khoshmehr, B. van Someren, D. Teichrib, M. Hammer, J. Förstner, B.I. Akca, Optics Letters 48 (2022) 207.","bibtex":"@article{Nikbakht_Khoshmehr_van Someren_Teichrib_Hammer_Förstner_Akca_2022, title={Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint}, volume={48}, DOI={<a href=\"https://doi.org/10.1364/ol.476537\">10.1364/ol.476537</a>}, number={2}, journal={Optics Letters}, publisher={Optica Publishing Group}, author={Nikbakht, Hamed and Khoshmehr, Mohammad Talebi and van Someren, Bob and Teichrib, Dieter and Hammer, Manfred and Förstner, Jens and Akca, B. Imran}, year={2022}, pages={207} }","mla":"Nikbakht, Hamed, et al. “Asymmetric, Non-Uniform 3-DB Directional Coupler with 300-Nm Bandwidth and a Small Footprint.” <i>Optics Letters</i>, vol. 48, no. 2, Optica Publishing Group, 2022, p. 207, doi:<a href=\"https://doi.org/10.1364/ol.476537\">10.1364/ol.476537</a>."},"intvolume":"        48","page":"207","date_updated":"2023-01-03T10:37:34Z","author":[{"first_name":"Hamed","last_name":"Nikbakht","full_name":"Nikbakht, Hamed"},{"full_name":"Khoshmehr, Mohammad Talebi","last_name":"Khoshmehr","first_name":"Mohammad Talebi"},{"first_name":"Bob","last_name":"van Someren","full_name":"van Someren, Bob"},{"first_name":"Dieter","full_name":"Teichrib, Dieter","last_name":"Teichrib"},{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"},{"last_name":"Akca","full_name":"Akca, B. Imran","first_name":"B. Imran"}],"volume":48,"doi":"10.1364/ol.476537","publication":"Optics Letters","abstract":[{"text":"Here we demonstrate a new, to the best of our knowledge, type of 3-dB coupler that has an ultra-broadband operational range from 1300 to 1600 nm with low fabrication sensitivity. The overall device size is 800 µm including in/out S-bend waveguides. The coupler is an asymmetric non-uniform directional coupler that consists of two tapered waveguides. One of the coupler arms is shifted by 100 µm in the propagation direction, which results in a more wavelength-insensitive 3-dB response compared to a standard (not shifted) coupler. Moreover, compared to a long adiabatic coupler, we achieved a similar wavelength response at a 16-times-smaller device length. The couplers were fabricated using the silicon nitride platform of Lionix International. We also experimentally demonstrated an optical switch that is made by using two of these couplers in a Mach–Zehnder interferometer configuration. According to experimental results, this optical switch exhibits –10 dB of extinction ratio over the 1500–1600 nm wavelength range. Our results indicate that this new type of coupler holds great promise for various applications, including optical imaging, telecommunications, and reconfigurable photonic processors where compact, fabrication-tolerant, and wavelength-insensitive couplers are essential.","lang":"eng"}],"file":[{"file_id":"35129","access_level":"local","file_name":"2023-01 Nikbakht - Optics Letter - Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and small footprint.pdf","embargo":"2024-01-03","file_size":3731864,"date_created":"2023-01-03T09:36:34Z","creator":"fossie","date_updated":"2023-01-03T09:36:34Z","relation":"main_file","content_type":"application/pdf","embargo_to":"open_access"}],"ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"issue":"2","year":"2022","publisher":"Optica Publishing Group","date_created":"2023-01-03T09:32:47Z","title":"Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint"},{"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"30389","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"75","name":"TRR 142 - C05: TRR 142 - Subproject C05"}],"file_date_updated":"2022-03-22T18:05:02Z","type":"conference","status":"public","editor":[{"first_name":"Sonia M.","last_name":"García-Blanco","full_name":"García-Blanco, Sonia M."},{"full_name":"Cheben, Pavel","last_name":"Cheben","first_name":"Pavel"}],"author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077"}],"date_updated":"2023-04-20T10:10:55Z","oa":"1","doi":"10.1117/12.2612208","has_accepted_license":"1","publication_status":"published","page":"1200414","citation":{"mla":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” <i>Integrated Optics: Devices, Materials, and Technologies XXVI</i>, edited by Sonia M. García-Blanco and Pavel Cheben, SPIE, 2022, p. 1200414, doi:<a href=\"https://doi.org/10.1117/12.2612208\">10.1117/12.2612208</a>.","bibtex":"@inproceedings{Hammer_2022, title={Small-scale online simulations in guided-wave photonics}, DOI={<a href=\"https://doi.org/10.1117/12.2612208\">10.1117/12.2612208</a>}, booktitle={Integrated Optics: Devices, Materials, and Technologies XXVI}, publisher={SPIE}, author={Hammer, Manfred}, editor={García-Blanco, Sonia M. and Cheben, Pavel}, year={2022}, pages={1200414} }","short":"M. Hammer, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI, SPIE, 2022, p. 1200414.","apa":"Hammer, M. (2022). Small-scale online simulations in guided-wave photonics. In S. M. García-Blanco &#38; P. Cheben (Eds.), <i>Integrated Optics: Devices, Materials, and Technologies XXVI</i> (p. 1200414). SPIE. <a href=\"https://doi.org/10.1117/12.2612208\">https://doi.org/10.1117/12.2612208</a>","chicago":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” In <i>Integrated Optics: Devices, Materials, and Technologies XXVI</i>, edited by Sonia M. García-Blanco and Pavel Cheben, 1200414. SPIE, 2022. <a href=\"https://doi.org/10.1117/12.2612208\">https://doi.org/10.1117/12.2612208</a>.","ieee":"M. Hammer, “Small-scale online simulations in guided-wave photonics,” in <i>Integrated Optics: Devices, Materials, and Technologies XXVI</i>, 2022, p. 1200414, doi: <a href=\"https://doi.org/10.1117/12.2612208\">10.1117/12.2612208</a>.","ama":"Hammer M. Small-scale online simulations in guided-wave photonics. In: García-Blanco SM, Cheben P, eds. <i>Integrated Optics: Devices, Materials, and Technologies XXVI</i>. SPIE; 2022:1200414. doi:<a href=\"https://doi.org/10.1117/12.2612208\">10.1117/12.2612208</a>"},"language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"publication":"Integrated Optics: Devices, Materials, and Technologies XXVI","file":[{"relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Small-scale online simulations in guided-wave photonics (official version).pdf","file_id":"30445","file_size":868473,"creator":"fossie","date_created":"2022-03-22T18:05:02Z","date_updated":"2022-03-22T18:05:02Z"}],"abstract":[{"lang":"eng","text":"Online solvers for a series of standard 1-D or 2-D problems in integrated optics will be discussed. Implemented on the basis of HTML/JavaScript/SVG with core routines compiled from well tested C++-sources, the quasi-analytical algorithms require a computational load that can be handled easily even by current mobile devices. So far the series covers the 1-D guided modes of dielectric multilayer slab waveguides and the oblique plane wave reflection from these, the modes of rectangular channel waveguides (in an approximation of effective indices), bend modes of curved multilayer slabs, whispering-gallery resonances (“Quasi-Normal-Modes”) supported by circular dielectric cavities, the hybrid modes of circular multi-step-index optical fibers, bound and leaky modes of 1-D complex multilayers, including plasmonic surface modes, and, with restrictions, quite general rectangular scattering problems in 2-D."}],"date_created":"2022-03-21T10:17:30Z","publisher":"SPIE","title":"Small-scale online simulations in guided-wave photonics","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":[{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"75","name":"TRR 142 - C5: TRR 142 - Subproject C5"},{"name":"TRR 142 - C2: TRR 142 - Subproject C2","_id":"72"},{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"}],"language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"publication":"Journal of Physics: Photonics","type":"journal_article","status":"public","abstract":[{"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.","lang":"eng"}],"volume":4,"author":[{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"last_name":"Ferreri","id":"65609","full_name":"Ferreri, Alessandro","first_name":"Alessandro"},{"first_name":"Manfred","full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"first_name":"Maximilian","full_name":"Albert, Maximilian","last_name":"Albert"},{"full_name":"Meier, Cedrik","id":"20798","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","first_name":"Cedrik"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"},{"last_name":"Sharapova","full_name":"Sharapova, Polina R.","id":"60286","first_name":"Polina R."}],"date_created":"2022-03-07T09:51:50Z","date_updated":"2025-12-16T11:31:04Z","publisher":"IOP Publishing","doi":"10.1088/2515-7647/ac5a5b","title":"Flexible source of correlated photons based on LNOI rib waveguides","related_material":{"link":[{"url":"https://doi.org/10.1088/2515-7647/acc70c","description":"Corrigendum for table C1","relation":"erratum"}]},"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>","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} }","short":"L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 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>.","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>.","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>"},"year":"2022"},{"title":"Resonant evanescent excitation of guided waves with high-order optical angular momentum","date_created":"2021-04-30T11:54:03Z","year":"2021","issue":"5","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguides"],"ddc":["530"],"file":[{"relation":"main_file","content_type":"application/pdf","file_size":1963211,"access_level":"open_access","file_id":"21933","file_name":"oamex.pdf","date_updated":"2021-04-30T11:57:14Z","date_created":"2021-04-30T11:57:14Z","creator":"fossie"},{"relation":"main_file","content_type":"application/pdf","embargo_to":"open_access","file_id":"21934","embargo":"2022-05-01","access_level":"local","file_name":"2021-04 Hammer - JOSA B - Resonant evanescent excitation of guides waves with high-order angular momentum.pdf","file_size":7750006,"creator":"fossie","date_created":"2021-04-30T11:59:16Z","date_updated":"2021-04-30T11:59:16Z"}],"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","doi":"10.1364/josab.422731","volume":38,"author":[{"first_name":"Manfred","full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348"},{"last_name":"Ebers","full_name":"Ebers, Lena","id":"40428","first_name":"Lena"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"date_updated":"2022-01-06T06:55:20Z","oa":"1","intvolume":"        38","page":"1717","citation":{"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>","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.","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} }","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>.","short":"M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 38 (2021) 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>"},"has_accepted_license":"1","publication_identifier":{"issn":["0740-3224","1520-8540"]},"publication_status":"published","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"},{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"status":"public","type":"journal_article"},{"year":"2021","issue":"12","title":"Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics","date_created":"2021-11-30T20:04:57Z","file":[{"date_updated":"2021-11-30T20:19:15Z","creator":"fossie","date_created":"2021-11-30T20:07:53Z","file_size":6618403,"file_id":"28197","access_level":"open_access","file_name":"2021-11 Hammer - OSA Continuum - Trenches.pdf","content_type":"application/pdf","relation":"main_file"}],"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."}],"publication":"OSA Continuum","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"page":"3081","intvolume":"         4","citation":{"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>.","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>.","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>","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>","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} }","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>."},"has_accepted_license":"1","publication_identifier":{"issn":["2578-7519"]},"publication_status":"published","doi":"10.1364/osac.437549","volume":4,"author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077"},{"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"}],"date_updated":"2022-11-18T09:58:03Z","oa":"1","status":"public","type":"journal_article","file_date_updated":"2021-11-30T20:19:15Z","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"477","_id":"28196","project":[{"_id":"53","name":"TRR 142"},{"_id":"56","name":"TRR 142 - Project Area C"}]},{"ddc":["530"],"language":[{"iso":"eng"}],"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","access_level":"open_access","file_id":"23825","file_name":"2021-07 Höpker J._Phys._Photonics_3_034022.pdf","file_size":1097820}],"date_created":"2021-09-03T08:04:06Z","title":"Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides","year":"2021","_id":"23728","project":[{"name":"TRR 142","_id":"53"}],"department":[{"_id":"15"},{"_id":"61"},{"_id":"230"}],"user_id":"49683","article_type":"original","file_date_updated":"2021-09-07T07:41:04Z","type":"journal_article","status":"public","date_updated":"2022-10-25T07:34:42Z","oa":"1","volume":3,"author":[{"full_name":"Höpker, Jan Philipp","id":"33913","last_name":"Höpker","first_name":"Jan Philipp"},{"last_name":"Verma","full_name":"Verma, Varun B","first_name":"Varun B"},{"first_name":"Maximilian","id":"46170","full_name":"Protte, Maximilian","last_name":"Protte"},{"full_name":"Ricken, Raimund","last_name":"Ricken","first_name":"Raimund"},{"last_name":"Quiring","full_name":"Quiring, Viktor","first_name":"Viktor"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"last_name":"Ebers","full_name":"Ebers, Lena","id":"40428","first_name":"Lena"},{"orcid":"0000-0002-6331-9348","last_name":"Hammer","full_name":"Hammer, Manfred","id":"48077","first_name":"Manfred"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"last_name":"Mirin","full_name":"Mirin, Richard P","first_name":"Richard P"},{"full_name":"Woo Nam, Sae","last_name":"Woo Nam","first_name":"Sae"},{"first_name":"Tim","last_name":"Bartley","full_name":"Bartley, Tim","id":"49683"}],"doi":"10.1088/2515-7647/ac105b","publication_identifier":{"issn":["2515-7647"]},"has_accepted_license":"1","publication_status":"published","intvolume":"         3","page":"034022","citation":{"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>.","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>","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>","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} }"}},{"citation":{"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.","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>.","short":"M. Hammer, L. Ebers, J. Förstner, Optical and Quantum Electronics 52 (2020).","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>"},"intvolume":"        52","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0306-8919","1572-817X"]},"doi":"10.1007/s11082-020-02595-z","author":[{"id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"last_name":"Ebers","id":"40428","full_name":"Ebers, Lena","first_name":"Lena"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"volume":52,"date_updated":"2022-01-06T06:54:22Z","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":[{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 - Subproject C5","_id":"75"},{"name":"TRR 142","_id":"53"}],"_id":"20189","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","file":[{"content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2020-10-24T08:11:40Z","creator":"fossie","date_created":"2020-10-24T08:11:40Z","file_size":2212769,"access_level":"closed","file_id":"20190","file_name":"2020-10 Hammer - OQE - Hybrid Coupled Mode Modelling Dielectric Tube.pdf"}],"abstract":[{"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.","lang":"eng"}],"publication":"Optical and Quantum Electronics","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_waveguides"]},{"_id":"20372","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C4","_id":"74"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","status":"public","type":"journal_article","doi":"10.1364/oe.409612","date_updated":"2022-01-06T06:54:26Z","volume":28,"author":[{"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","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"intvolume":"        28","page":"36361","citation":{"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>","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} }","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>.","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>","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>.","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."},"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","keyword":["tet_topic_waveguides"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","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."}],"publication":"Optics Express","title":"Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method","date_created":"2020-11-17T09:52:47Z","year":"2020","issue":"24"},{"year":"2020","date_created":"2021-04-22T15:56:45Z","title":"Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics","publication":"OSA Quantum 2.0 Conference","abstract":[{"lang":"eng","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."}],"file":[{"date_created":"2021-04-22T15:58:52Z","creator":"fossie","date_updated":"2021-04-22T15:58:52Z","access_level":"closed","file_name":"Quantum2.0-Towards SSC hybrid integration for quantum photonics[4936].pdf","file_id":"21720","file_size":1704199,"content_type":"application/pdf","relation":"main_file","success":1}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"language":[{"iso":"eng"}],"publication_identifier":{"isbn":["9781943580811"]},"has_accepted_license":"1","publication_status":"published","citation":{"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>","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>.","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>.","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>","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.","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} }"},"date_updated":"2022-10-25T07:41:15Z","author":[{"first_name":"Maximilian","last_name":"Protte","full_name":"Protte, Maximilian","id":"46170"},{"first_name":"Lena","last_name":"Ebers","id":"40428","full_name":"Ebers, Lena"},{"first_name":"Manfred","id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer"},{"first_name":"Jan Philipp","last_name":"Höpker","full_name":"Höpker, Jan Philipp","id":"33913"},{"last_name":"Albert","full_name":"Albert, Maximilian","first_name":"Maximilian"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","id":"20798","full_name":"Meier, Cedrik","first_name":"Cedrik"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"},{"last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263","first_name":"Christine"},{"full_name":"Bartley, Tim","id":"49683","last_name":"Bartley","first_name":"Tim"}],"doi":"10.1364/quantum.2020.qth7a.8","type":"conference","status":"public","_id":"21719","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"}],"user_id":"49683","article_number":"QTh7A.8","file_date_updated":"2021-04-22T15:58:52Z"},{"status":"public","type":"journal_article","file_date_updated":"2019-08-09T07:09:04Z","_id":"12908","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"75","name":"TRR 142 - Subproject C5"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","intvolume":"        36","page":"2395","citation":{"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>","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.","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>.","short":"M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 36 (2019) 2395.","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} }","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>"},"publication_identifier":{"issn":["0740-3224","1520-8540"]},"has_accepted_license":"1","publication_status":"published","doi":"10.1364/josab.36.002395","oa":"1","date_updated":"2022-01-06T06:51:24Z","volume":36,"author":[{"full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"file":[{"file_id":"12909","file_name":"2019-07 Hammer - JOSA B - Oblique Quasi-Lossless Excitation of a Thin Silicon Slab Waveguide (preprint).pdf","access_level":"open_access","file_size":728533,"creator":"fossie","date_created":"2019-08-09T07:09:04Z","date_updated":"2019-08-09T07:09:04Z","relation":"main_file","content_type":"application/pdf"}],"publication":"Journal of the Optical Society of America B","keyword":["tet_topic_waveguides"],"ddc":["530"],"language":[{"iso":"eng"}],"year":"2019","title":"Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating","date_created":"2019-08-09T07:07:45Z"},{"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","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":[{"first_name":"Lena","last_name":"Ebers","full_name":"Ebers, Lena","id":"40428"},{"orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred","first_name":"Manfred"},{"full_name":"Berkemeier, Manuel B.","last_name":"Berkemeier","first_name":"Manuel B."},{"first_name":"Alexander","full_name":"Menzel, Alexander","last_name":"Menzel"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"page":"3288","intvolume":"         2","citation":{"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>","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>.","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.","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>","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} }","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."},"has_accepted_license":"1","publication_identifier":{"issn":["2578-7519"]},"publication_status":"published","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":[{"creator":"fossie","date_created":"2019-11-15T15:33:26Z","date_updated":"2019-11-15T15:33:26Z","file_id":"15012","file_name":"2019-11-12 Ebers - Add Drop Filter - OSA continuum (official version).pdf","access_level":"open_access","file_size":882779,"content_type":"application/pdf","relation":"main_file"}],"publication":"OSA Continuum","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"},{"type":"patent","status":"public","department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","_id":"7720","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"file_date_updated":"2019-02-15T10:21:08Z","has_accepted_license":"1","page":"9","citation":{"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} }","mla":"Hammer, Manfred, et al. <i>Optical Transition between Two Optical Waveguides Layer and Method for Transmitting Light</i>. 2019.","short":"M. Hammer, J. Förstner, L. Ebers, (2019).","apa":"Hammer, M., Förstner, J., &#38; Ebers, L. (2019). <i>Optical transition between two optical waveguides layer and method for transmitting light</i>.","ama":"Hammer M, Förstner J, Ebers L. Optical transition between two optical waveguides layer and method for transmitting light. Published online 2019.","chicago":"Hammer, Manfred, Jens Förstner, and Lena Ebers. “Optical Transition between Two Optical Waveguides Layer and Method for Transmitting Light,” 2019.","ieee":"M. Hammer, J. Förstner, and L. Ebers, “Optical transition between two optical waveguides layer and method for transmitting light.” 2019."},"author":[{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner"},{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"}],"ipc":"G02B 6/26","date_updated":"2022-04-27T07:35:46Z","application_number":"102018108110","main_file_link":[{"url":"https://patents.google.com/patent/DE102018108110B3/en"}],"ipn":"DE102018108110B3","file":[{"content_type":"application/pdf","relation":"main_file","success":1,"creator":"fossie","date_created":"2019-02-15T10:21:08Z","date_updated":"2019-02-15T10:21:08Z","access_level":"closed","file_id":"7721","file_name":"2019-01-31 DE-Patentschrift_5349.pdf","file_size":155604}],"abstract":[{"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":"ger"},{"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.","lang":"eng"}],"publication_date":"2019-01-31","keyword":["tet_topic_waveguides"],"ddc":["530"],"year":"2019","application_date":"2018-04-05","date_created":"2019-02-15T10:25:59Z","title":"Optical transition between two optical waveguides layer and method for transmitting light"},{"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","volume":27,"author":[{"orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred","first_name":"Manfred"},{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"date_created":"2019-03-26T10:39:00Z","date_updated":"2023-01-03T10:34:29Z","page":"8","intvolume":"        27","citation":{"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>","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>.","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>.","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} }","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>"},"year":"2019","issue":"7","has_accepted_license":"1","file_date_updated":"2019-03-27T13:47:50Z","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguides"],"ddc":["600"],"article_type":"original","department":[{"_id":"61"}],"user_id":"158","_id":"8634","status":"public","file":[{"file_name":"oe-27-7-9313.pdf","access_level":"closed","file_id":"8714","file_size":2388537,"date_created":"2019-03-27T13:47:50Z","creator":"nprante","date_updated":"2019-03-27T13:47:50Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"abstract":[{"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”.","lang":"eng"}],"publication":"Optics Express","type":"journal_article"}]