[{"citation":{"chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” Journal of the Optical Society of America B 40, no. 4 (2023): 862. https://doi.org/10.1364/josab.485725.","ama":"Hammer M, Farheen H, Förstner J. How to suppress radiative losses in high-contrast integrated Bragg gratings. Journal of the Optical Society of America B. 2023;40(4):862. doi:10.1364/josab.485725","apa":"Hammer, M., Farheen, H., & Förstner, J. (2023). How to suppress radiative losses in high-contrast integrated Bragg gratings. Journal of the Optical Society of America B, 40(4), 862. https://doi.org/10.1364/josab.485725","mla":"Hammer, Manfred, et al. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” Journal of the Optical Society of America B, vol. 40, no. 4, Optica Publishing Group, 2023, p. 862, doi:10.1364/josab.485725.","bibtex":"@article{Hammer_Farheen_Förstner_2023, title={How to suppress radiative losses in high-contrast integrated Bragg gratings}, volume={40}, DOI={10.1364/josab.485725}, 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} }","short":"M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.","ieee":"M. Hammer, H. Farheen, and J. Förstner, “How to suppress radiative losses in high-contrast integrated Bragg gratings,” Journal of the Optical Society of America B, vol. 40, no. 4, p. 862, 2023, doi: 10.1364/josab.485725."},"year":"2023","type":"journal_article","page":"862","issue":"4","intvolume":" 40","_id":"43245","status":"public","has_accepted_license":"1","date_created":"2023-03-31T13:04:43Z","volume":40,"file":[{"access_level":"open_access","file_name":"ogr-afterreview.pdf","date_created":"2023-03-31T13:14:59Z","relation":"main_file","content_type":"application/pdf","date_updated":"2023-03-31T13:14:59Z","creator":"fossie","file_id":"43247","file_size":1982311}],"publisher":"Optica Publishing Group","author":[{"last_name":"Hammer","id":"48077","first_name":"Manfred","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred"},{"full_name":"Farheen, Henna","first_name":"Henna","last_name":"Farheen"},{"id":"158","last_name":"Förstner","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"keyword":["tet_topic_waveguide"],"publication":"Journal of the Optical Society of America B","file_date_updated":"2023-03-31T13:14:59Z","user_id":"158","ddc":["530"],"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"}],"language":[{"iso":"eng"}],"oa":"1","doi":"10.1364/josab.485725","date_updated":"2023-04-20T10:03:40Z","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"_id":"167","name":"TRR 142 - B06: TRR 142 - Subproject B06"}],"publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]},"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"title":"How to suppress radiative losses in high-contrast integrated Bragg gratings"},{"abstract":[{"text":"Resonant evanescent coupling can be utilized to selectively excite orbital angular momentum (OAM) modes of high angular order supported by a thin circular dielectric rod. Our 2.5-D hybrid-analytical coupled mode model combines the vectorial fields associated with the fundamental TE- and TM-modes of a standard silicon photonics slab waveguide, propagating at oblique angles with respect to the rod axis, and the hybrid modes supported by the rod. One observes an efficient resonant interaction in cases where the common axial wavenumber of the waves in the slab matches the propagation constant of one or more modes of the rod. For certain modes of high angular order, the incident wave is able to transfer its directionality to the field in the fiber, exciting effectively only one of a pair of degenerate OAM modes","lang":"eng"}],"user_id":"158","ddc":["530"],"file":[{"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","date_created":"2022-03-22T18:03:50Z","relation":"main_file","date_updated":"2022-03-22T18:03:50Z","content_type":"application/pdf","creator":"fossie","file_id":"30444","file_size":2015899}],"publisher":"SPIE","author":[{"last_name":"Hammer","id":"48077","first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348"},{"full_name":"Ebers, Lena","first_name":"Lena","id":"40428","last_name":"Ebers"},{"last_name":"Förstner","id":"158","first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862"}],"keyword":["tet_topic_waveguide"],"file_date_updated":"2022-03-22T18:03:50Z","publication":"Complex Light and Optical Forces XVI","status":"public","has_accepted_license":"1","date_created":"2022-03-21T10:12:58Z","_id":"30387","citation":{"ieee":"M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber,” in Complex Light and Optical Forces XVI, 2022, p. 120170F, doi: 10.1117/12.2612179.","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={10.1117/12.2612179}, booktitle={Complex Light and Optical Forces XVI}, publisher={SPIE}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, editor={Andrews, David L. and Galvez, Enrique J. and Rubinsztein-Dunlop, Halina}, year={2022}, pages={120170F} }","mla":"Hammer, Manfred, et al. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” Complex Light and Optical Forces XVI, edited by David L. Andrews et al., SPIE, 2022, p. 120170F, doi:10.1117/12.2612179.","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” In Complex Light and Optical Forces XVI, edited by David L. Andrews, Enrique J. Galvez, and Halina Rubinsztein-Dunlop, 120170F. SPIE, 2022. https://doi.org/10.1117/12.2612179.","apa":"Hammer, M., Ebers, L., & Förstner, J. (2022). Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber. In D. L. Andrews, E. J. Galvez, & H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI (p. 120170F). SPIE. https://doi.org/10.1117/12.2612179","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. Complex Light and Optical Forces XVI. SPIE; 2022:120170F. doi:10.1117/12.2612179"},"type":"conference","year":"2022","page":"120170F","title":"Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"project":[{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}],"editor":[{"full_name":"Andrews, David L.","first_name":"David L.","last_name":"Andrews"},{"last_name":"Galvez","full_name":"Galvez, Enrique J.","first_name":"Enrique J."},{"last_name":"Rubinsztein-Dunlop","first_name":"Halina","full_name":"Rubinsztein-Dunlop, Halina"}],"publication_status":"published","date_updated":"2022-03-22T18:04:20Z","oa":"1","doi":"10.1117/12.2612179","language":[{"iso":"eng"}]},{"_id":"30722","date_updated":"2022-03-29T18:44:30Z","doi":"10.17619/UNIPB/1-1288","citation":{"mla":"Ebers, Lena. Semi-Guided Waves in Integrated Optical Waveguide Structures. 2022, doi:10.17619/UNIPB/1-1288.","bibtex":"@book{Ebers_2022, title={Semi-guided waves in integrated optical waveguide structures}, DOI={10.17619/UNIPB/1-1288}, author={Ebers, Lena}, year={2022} }","ieee":"L. Ebers, Semi-guided waves in integrated optical waveguide structures. 2022.","chicago":"Ebers, Lena. Semi-Guided Waves in Integrated Optical Waveguide Structures, 2022. https://doi.org/10.17619/UNIPB/1-1288.","ama":"Ebers L. Semi-Guided Waves in Integrated Optical Waveguide Structures.; 2022. doi:10.17619/UNIPB/1-1288","short":"L. Ebers, Semi-Guided Waves in Integrated Optical Waveguide Structures, 2022.","apa":"Ebers, L. (2022). Semi-guided waves in integrated optical waveguide structures. https://doi.org/10.17619/UNIPB/1-1288"},"type":"dissertation","year":"2022","supervisor":[{"orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","first_name":"Jens","id":"158","last_name":"Förstner"}],"language":[{"iso":"eng"}],"abstract":[{"text":"In dieser Arbeit wird die elektromagnetische Wellenausbreitung in integrierten optischen Wellenleitern mit Hilfe von halb analytischen und numerischen Simulationsmethoden untersucht. Im ersten Teil werden 2-D Si/SiO2-Wellenleiterkonfigurationen mit hohem Brechungsindexkontrast betrachtet. Die Strukturen werden mit halb geführten Wellen unter schrägen Ausbreitungswinkeln angeregt. Dadurch kann die Leistungsübertragung zu bestimmten ausgehenden Moden unterdrückt werden, wodurch vollständig verlustfreie Systeme entstehen. Zusätzlich dient die Anregung mit einem seitlich begrenzten, einfallenden Wellenbündel aus halb geführten Wellen dazu, praktisch relevantere 3-D Konfigurationen zu realisieren. Darüber hinaus wird eine schrittweise Winkelspektrum-Methode vorgestellt, die es ermöglicht, in Kombination mit voll vektoriellen 2-D Finite-Elemente-Lösungen für Teilprobleme mit geringerer Komplexität, die Wellenausbreitung in planaren, linsenförmigen Wellenleitern numerisch in drei Raumrichtungen zu berechnen. Im zweiten Teil dieser Arbeit wird die Ausbreitung in Wellenleiterstrukturen aus Lithiumniobat untersucht, welche für quantenoptische Effekte genutzt werden. Zur Detektion einzelner Photonen werden supraleitende Nanodrähte auf eindiffundierten Lithiumniobat Wellenleitern mit zusätzlicher Taperschicht aus Silizium betrachtet. Um die Wellenausbreitung in diesen 3-D Wellenleitern zu beschreiben, wird eine einseitig gerichtete Finite-Elemente „Modal Matching“ Methode eingeführt. Abschließend werden Rippenwellenleiter aus Lithiumniobat analysiert, die auf Siliziumdioxid Plattformen aufgebracht sind. Der Schwerpunkt liegt hier auf dem nichtlinearen „Parametric Down-Conversion“ Prozess, der für die Erzeugung verschränkter Photonen verwendet wird.","lang":"eng"},{"lang":"eng","text":"In this work, the electromagnetic wave propagation in integrated optical waveguides is studied by using semi-analytical and numerical simulation methods. In the first part, 2-D high-index contrast Si/SiO2 dielectric slab waveguide configurations are investigated. The structures are excited with semi-guided waves at oblique angles of propagation. Due to this, power transfer to specific outgoing modes can be suppressed, resulting in completely lossless configurations. The excitation is further examined for incoming, laterally confined wave bundles of semi-guided waves to realize practically more relevant 3-D configurations. Additionally, a stepwise angular spectrum method in combination with full vectorial 2-D finite element solutions for subproblems of lower complexity to numerically simulate the wave propagation in full 3-D planar lens-like waveguides is presented. In the second part, the wave propagation in lithium niobate waveguide structures is examined, which are used for quantum optical effects. On the one hand, superconducting nanowires on titanium in-diffused lithium niobate waveguides with an additional tapered silicon layer are used for single photon detection. The wave propagation in these 3-D multiscale tapers is studied by introducing a unidirectional finite element modal matching method. On the other hand, lithium niobate rib waveguides on silicon dioxide platforms are analyzed, focusing on the nonlinear parametric down-conversion process used for the generation of entangled photons."}],"title":"Semi-guided waves in integrated optical waveguide structures","user_id":"158","author":[{"last_name":"Ebers","id":"40428","first_name":"Lena","full_name":"Ebers, Lena"}],"department":[{"_id":"61"},{"_id":"230"}],"keyword":["tet_topic_waveguide"],"status":"public","date_created":"2022-03-29T18:42:08Z"},{"publication_identifier":{"issn":["0146-9592","1539-4794"]},"publication_status":"published","department":[{"_id":"61"},{"_id":"230"}],"title":"Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint","language":[{"iso":"eng"}],"doi":"10.1364/ol.476537","date_updated":"2023-01-03T10:37:34Z","volume":48,"date_created":"2023-01-03T09:32:47Z","has_accepted_license":"1","status":"public","keyword":["tet_topic_waveguide"],"file_date_updated":"2023-01-03T09:36:34Z","publication":"Optics Letters","publisher":"Optica Publishing Group","author":[{"last_name":"Nikbakht","first_name":"Hamed","full_name":"Nikbakht, Hamed"},{"full_name":"Khoshmehr, Mohammad Talebi","first_name":"Mohammad Talebi","last_name":"Khoshmehr"},{"first_name":"Bob","full_name":"van Someren, Bob","last_name":"van Someren"},{"full_name":"Teichrib, Dieter","first_name":"Dieter","last_name":"Teichrib"},{"first_name":"Manfred","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","last_name":"Hammer","id":"48077"},{"last_name":"Förstner","id":"158","first_name":"Jens","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens"},{"first_name":"B. Imran","full_name":"Akca, B. Imran","last_name":"Akca"}],"file":[{"creator":"fossie","embargo":"2024-01-03","file_id":"35129","relation":"main_file","content_type":"application/pdf","date_updated":"2023-01-03T09:36:34Z","embargo_to":"open_access","file_size":3731864,"file_name":"2023-01 Nikbakht - Optics Letter - Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and small footprint.pdf","date_created":"2023-01-03T09:36:34Z","access_level":"local"}],"ddc":["530"],"user_id":"158","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"}],"page":"207","citation":{"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={10.1364/ol.476537}, 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.” Optics Letters, vol. 48, no. 2, Optica Publishing Group, 2022, p. 207, doi:10.1364/ol.476537.","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.” Optics Letters 48, no. 2 (2022): 207. https://doi.org/10.1364/ol.476537.","apa":"Nikbakht, H., Khoshmehr, M. T., van Someren, B., Teichrib, D., Hammer, M., Förstner, J., & Akca, B. I. (2022). Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint. Optics Letters, 48(2), 207. https://doi.org/10.1364/ol.476537","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. Optics Letters. 2022;48(2):207. doi:10.1364/ol.476537","ieee":"H. Nikbakht et al., “Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint,” Optics Letters, vol. 48, no. 2, p. 207, 2022, doi: 10.1364/ol.476537.","short":"H. Nikbakht, M.T. Khoshmehr, B. van Someren, D. Teichrib, M. Hammer, J. Förstner, B.I. Akca, Optics Letters 48 (2022) 207."},"type":"journal_article","year":"2022","issue":"2","_id":"35128","intvolume":" 48"},{"language":[{"iso":"eng"}],"date_updated":"2023-03-24T07:39:18Z","doi":"10.1088/2515-7647/ac5a5b","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"287"}],"publication_status":"published","publication_identifier":{"issn":["2515-7647"]},"project":[{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"},{"name":"TRR 142 - C2: TRR 142 - Subproject C2","_id":"72"},{"name":"TRR 142: TRR 142","_id":"53"}],"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"}]},"page":"025001","citation":{"ieee":"L. Ebers et al., “Flexible source of correlated photons based on LNOI rib waveguides,” Journal of Physics: Photonics, vol. 4, p. 025001, 2022, doi: 10.1088/2515-7647/ac5a5b.","short":"L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 025001.","bibtex":"@article{Ebers_Ferreri_Hammer_Albert_Meier_Förstner_Sharapova_2022, title={Flexible source of correlated photons based on LNOI rib waveguides}, volume={4}, DOI={10.1088/2515-7647/ac5a5b}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Ebers, Lena and Ferreri, Alessandro and Hammer, Manfred and Albert, Maximilian and Meier, Cedrik and Förstner, Jens and Sharapova, Polina R.}, year={2022}, pages={025001} }","mla":"Ebers, Lena, et al. “Flexible Source of Correlated Photons Based on LNOI Rib Waveguides.” Journal of Physics: Photonics, vol. 4, IOP Publishing, 2022, p. 025001, doi:10.1088/2515-7647/ac5a5b.","ama":"Ebers L, Ferreri A, Hammer M, et al. Flexible source of correlated photons based on LNOI rib waveguides. Journal of Physics: Photonics. 2022;4:025001. doi:10.1088/2515-7647/ac5a5b","apa":"Ebers, L., Ferreri, A., Hammer, M., Albert, M., Meier, C., Förstner, J., & Sharapova, P. R. (2022). Flexible source of correlated photons based on LNOI rib waveguides. Journal of Physics: Photonics, 4, 025001. https://doi.org/10.1088/2515-7647/ac5a5b","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.” Journal of Physics: Photonics 4 (2022): 025001. https://doi.org/10.1088/2515-7647/ac5a5b."},"year":"2022","type":"journal_article","_id":"30210","intvolume":" 4","publication":"Journal of Physics: Photonics","keyword":["tet_topic_waveguide"],"author":[{"full_name":"Ebers, Lena","first_name":"Lena","id":"40428","last_name":"Ebers"},{"first_name":"Alessandro","full_name":"Ferreri, Alessandro","last_name":"Ferreri","id":"65609"},{"id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","first_name":"Manfred"},{"full_name":"Albert, Maximilian","first_name":"Maximilian","last_name":"Albert"},{"id":"20798","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik","first_name":"Cedrik"},{"last_name":"Förstner","id":"158","first_name":"Jens","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens"},{"last_name":"Sharapova","id":"60286","first_name":"Polina R.","full_name":"Sharapova, Polina R."}],"publisher":"IOP Publishing","volume":4,"date_created":"2022-03-07T09:51:50Z","status":"public","abstract":[{"lang":"eng","text":"Lithium niobate on insulator (LNOI) has a great potential for photonic integrated circuits, providing substantial versatility in design of various integrated components. To properly use these components in the implementation of different quantum protocols, photons with different properties are required. In this paper, we theoretically demonstrate a flexible source of correlated photons built on the LNOI waveguide of a special geometry. This source is based on the parametric down-conversion (PDC) process, in which the signal and idler photons are generated at the telecom wavelength and have different spatial profiles and polarizations, but the same group velocities. Distinguishability in polarizations and spatial profiles facilitates the routing and manipulating individual photons, while the equality of their group velocities leads to the absence of temporal walk-off between photons. We show how the spectral properties of the generated photons and the number of their frequency modes can be controlled depending on the pump characteristics and the waveguide length. Finally, we discuss special regimes, in which narrowband light with strong frequency correlations and polarization-entangled Bell states are generated at the telecom wavelength."}],"user_id":"158"},{"doi":"10.1117/12.2612208","oa":"1","date_updated":"2023-04-20T10:10:55Z","language":[{"iso":"eng"}],"title":"Small-scale online simulations in guided-wave photonics","editor":[{"last_name":"García-Blanco","full_name":"García-Blanco, Sonia M.","first_name":"Sonia M."},{"first_name":"Pavel","full_name":"Cheben, Pavel","last_name":"Cheben"}],"publication_status":"published","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"name":"TRR 142 - C05: TRR 142 - Subproject C05","_id":"75"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"_id":"30389","type":"conference","citation":{"ama":"Hammer M. Small-scale online simulations in guided-wave photonics. In: García-Blanco SM, Cheben P, eds. Integrated Optics: Devices, Materials, and Technologies XXVI. SPIE; 2022:1200414. doi:10.1117/12.2612208","apa":"Hammer, M. (2022). Small-scale online simulations in guided-wave photonics. In S. M. García-Blanco & P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI (p. 1200414). SPIE. https://doi.org/10.1117/12.2612208","chicago":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” In Integrated Optics: Devices, Materials, and Technologies XXVI, edited by Sonia M. García-Blanco and Pavel Cheben, 1200414. SPIE, 2022. https://doi.org/10.1117/12.2612208.","mla":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” Integrated Optics: Devices, Materials, and Technologies XXVI, edited by Sonia M. García-Blanco and Pavel Cheben, SPIE, 2022, p. 1200414, doi:10.1117/12.2612208.","bibtex":"@inproceedings{Hammer_2022, title={Small-scale online simulations in guided-wave photonics}, DOI={10.1117/12.2612208}, 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.","ieee":"M. Hammer, “Small-scale online simulations in guided-wave photonics,” in Integrated Optics: Devices, Materials, and Technologies XXVI, 2022, p. 1200414, doi: 10.1117/12.2612208."},"year":"2022","page":"1200414","ddc":["530"],"user_id":"158","abstract":[{"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.","lang":"eng"}],"status":"public","has_accepted_license":"1","date_created":"2022-03-21T10:17:30Z","author":[{"first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077"}],"publisher":"SPIE","publication":"Integrated Optics: Devices, Materials, and Technologies XXVI","keyword":["tet_topic_waveguide"],"file_date_updated":"2022-03-22T18:05:02Z","file":[{"file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Small-scale online simulations in guided-wave photonics (official version).pdf","date_created":"2022-03-22T18:05:02Z","access_level":"open_access","file_size":868473,"file_id":"30445","creator":"fossie","content_type":"application/pdf","date_updated":"2022-03-22T18:05:02Z","relation":"main_file"}]},{"issue":"12","_id":"28196","intvolume":" 4","page":"3081","citation":{"chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Configurable Lossless Broadband Beam Splitters for Semi-Guided Waves in Integrated Silicon Photonics.” OSA Continuum 4, no. 12 (2021): 3081. https://doi.org/10.1364/osac.437549.","apa":"Hammer, M., Ebers, L., & Förstner, J. (2021). Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics. OSA Continuum, 4(12), 3081. https://doi.org/10.1364/osac.437549","ama":"Hammer M, Ebers L, Förstner J. Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics. OSA Continuum. 2021;4(12):3081. doi:10.1364/osac.437549","bibtex":"@article{Hammer_Ebers_Förstner_2021, title={Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics}, volume={4}, DOI={10.1364/osac.437549}, number={12}, journal={OSA Continuum}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, year={2021}, pages={3081} }","mla":"Hammer, Manfred, et al. “Configurable Lossless Broadband Beam Splitters for Semi-Guided Waves in Integrated Silicon Photonics.” OSA Continuum, vol. 4, no. 12, 2021, p. 3081, doi:10.1364/osac.437549.","short":"M. Hammer, L. Ebers, J. Förstner, OSA Continuum 4 (2021) 3081.","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics,” OSA Continuum, vol. 4, no. 12, p. 3081, 2021, doi: 10.1364/osac.437549."},"type":"journal_article","year":"2021","user_id":"477","ddc":["530"],"abstract":[{"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.","lang":"eng"}],"date_created":"2021-11-30T20:04:57Z","status":"public","has_accepted_license":"1","volume":4,"file":[{"file_name":"2021-11 Hammer - OSA Continuum - Trenches.pdf","date_created":"2021-11-30T20:07:53Z","access_level":"open_access","file_size":6618403,"creator":"fossie","file_id":"28197","content_type":"application/pdf","date_updated":"2021-11-30T20:19:15Z","relation":"main_file"}],"keyword":["tet_topic_waveguide"],"publication":"OSA Continuum","file_date_updated":"2021-11-30T20:19:15Z","author":[{"last_name":"Hammer","id":"48077","first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348"},{"full_name":"Ebers, Lena","first_name":"Lena","id":"40428","last_name":"Ebers"},{"first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158"}],"oa":"1","doi":"10.1364/osac.437549","date_updated":"2022-11-18T09:58:03Z","language":[{"iso":"eng"}],"title":"Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"}],"publication_identifier":{"issn":["2578-7519"]},"publication_status":"published","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}]},{"date_updated":"2022-10-25T07:41:15Z","doi":"10.1364/quantum.2020.qth7a.8","language":[{"iso":"eng"}],"title":"Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"}],"publication_status":"published","publication_identifier":{"isbn":["9781943580811"]},"_id":"21719","article_number":"QTh7A.8","year":"2020","citation":{"mla":"Protte, Maximilian, et al. “Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics.” OSA Quantum 2.0 Conference, QTh7A.8, 2020, doi:10.1364/quantum.2020.qth7a.8.","bibtex":"@inproceedings{Protte_Ebers_Hammer_Höpker_Albert_Quiring_Meier_Förstner_Silberhorn_Bartley_2020, title={Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics}, DOI={10.1364/quantum.2020.qth7a.8}, 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} }","ama":"Protte M, Ebers L, Hammer M, et al. Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics. In: OSA Quantum 2.0 Conference. ; 2020. doi:10.1364/quantum.2020.qth7a.8","apa":"Protte, M., Ebers, L., Hammer, M., Höpker, J. P., Albert, M., Quiring, V., Meier, C., Förstner, J., Silberhorn, C., & Bartley, T. (2020). Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics. OSA Quantum 2.0 Conference, Article QTh7A.8. https://doi.org/10.1364/quantum.2020.qth7a.8","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 OSA Quantum 2.0 Conference, 2020. https://doi.org/10.1364/quantum.2020.qth7a.8.","ieee":"M. Protte et al., “Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics,” 2020, doi: 10.1364/quantum.2020.qth7a.8.","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."},"type":"conference","abstract":[{"text":"We fabricate silicon tapers to increase the mode overlap of superconducting detectors on Ti:LiNbO3 waveguides. Mode images show a reduction in mode size from 6 µm to 2 µm FWHM, agreeing with beam propagation simulations.","lang":"eng"}],"user_id":"49683","ddc":["530"],"file":[{"relation":"main_file","success":1,"date_updated":"2021-04-22T15:58:52Z","content_type":"application/pdf","creator":"fossie","file_id":"21720","file_size":1704199,"access_level":"closed","file_name":"Quantum2.0-Towards SSC hybrid integration for quantum photonics[4936].pdf","date_created":"2021-04-22T15:58:52Z"}],"keyword":["tet_topic_waveguide"],"file_date_updated":"2021-04-22T15:58:52Z","publication":"OSA Quantum 2.0 Conference","author":[{"full_name":"Protte, Maximilian","first_name":"Maximilian","id":"46170","last_name":"Protte"},{"last_name":"Ebers","id":"40428","first_name":"Lena","full_name":"Ebers, Lena"},{"full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","first_name":"Manfred","id":"48077","last_name":"Hammer"},{"first_name":"Jan Philipp","full_name":"Höpker, Jan Philipp","last_name":"Höpker","id":"33913"},{"first_name":"Maximilian","full_name":"Albert, Maximilian","last_name":"Albert"},{"last_name":"Quiring","full_name":"Quiring, Viktor","first_name":"Viktor"},{"orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik","first_name":"Cedrik","id":"20798","last_name":"Meier"},{"last_name":"Förstner","id":"158","first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862"},{"full_name":"Silberhorn, Christine","first_name":"Christine","id":"26263","last_name":"Silberhorn"},{"id":"49683","last_name":"Bartley","full_name":"Bartley, Tim","first_name":"Tim"}],"date_created":"2021-04-22T15:56:45Z","status":"public","has_accepted_license":"1"},{"language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:59:33Z","oa":"1","doi":"10.1364/OE.26.018621","department":[{"_id":"61"}],"project":[{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"53","name":"TRR 142"},{"_id":"75","name":"TRR 142 - Subproject C5"}],"publication_status":"published","title":"Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges","type":"journal_article","year":"2018","citation":{"mla":"Ebers, Lena, et al. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” Optics Express, vol. 26, no. 14, OSA Publishing, 2018, pp. 18621–32, doi:10.1364/OE.26.018621.","bibtex":"@article{Ebers_Hammer_Förstner_2018, title={Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges}, volume={26}, DOI={10.1364/OE.26.018621}, number={14}, journal={Optics Express}, publisher={OSA Publishing}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2018}, pages={18621–18632} }","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” Optics Express 26, no. 14 (2018): 18621–32. https://doi.org/10.1364/OE.26.018621.","apa":"Ebers, L., Hammer, M., & Förstner, J. (2018). Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. Optics Express, 26(14), 18621–18632. https://doi.org/10.1364/OE.26.018621","ama":"Ebers L, Hammer M, Förstner J. Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. Optics Express. 2018;26(14):18621-18632. doi:10.1364/OE.26.018621","ieee":"L. Ebers, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges,” Optics Express, vol. 26, no. 14, pp. 18621–18632, 2018.","short":"L. Ebers, M. Hammer, J. Förstner, Optics Express 26 (2018) 18621–18632."},"page":"18621-18632","_id":"3740","intvolume":" 26","urn":"37409","issue":"14","file":[{"creator":"hclaudia","file_id":"3741","file_size":6193865,"relation":"main_file","content_type":"application/pdf","date_updated":"2018-08-01T09:30:58Z","date_created":"2018-08-01T09:30:58Z","file_name":"2018-07 Ebers_Hammer_Förstner_OpticsExpress_Oblique incidence of semi guided planar waves on slab waveguide steps_Rounded Edges.pdf","access_level":"open_access"}],"author":[{"id":"40428","last_name":"Ebers","full_name":"Ebers, Lena","first_name":"Lena"},{"first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077"},{"last_name":"Förstner","id":"158","first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862"}],"publisher":"OSA Publishing","keyword":["tet_topic_waveguide"],"file_date_updated":"2018-08-01T09:30:58Z","publication":"Optics Express","status":"public","has_accepted_license":"1","date_created":"2018-08-01T09:31:03Z","volume":26,"article_type":"letter_note","abstract":[{"lang":"eng","text":"Oblique propagation of semi-guided waves across slab waveguide structures with bent corners is investigated. A critical angle can be defined beyond which all radiation losses are suppressed. Additionally an increase of the curvature radius of the bends also leads to low-loss configurations for incidence angles below that critical angle. A combination of two bent corner systems represents a step-like structure, behaving like a Fabry-Perot interferometer, with two partial reflectors separated by the vertical height between the horizontal slabs. We numerically analyse typical high-index-contrast Si/SiO2 structures for their reflectance and transmittance properties. When increasing the curvature radius the resonant effect becomes less relevant such that full transmittance is reached with less critical conditions on the vertical distance or the incidence angle. For practical interest 3-D problems are considered, where the structures are excited by the fundamental mode of a wide, shallow rib waveguide. High transmittance levels can be observed also for these 3-D configurations depending on the width of the rib."}],"user_id":"158","ddc":["620"]},{"edition":"204","department":[{"_id":"61"}],"publication_status":"published","publication_identifier":{"isbn":["978-3-319-55438-9"]},"editor":[{"last_name":"Agrawal","full_name":"Agrawal, Arti","first_name":"Arti"}],"title":"Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory","series_title":" Springer Series in Optical Sciences book series","language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:59:34Z","publication":"Recent Trends in Computational Photonics","keyword":["tet_topic_waveguide","tet_topic_numerics"],"publisher":"Springer","author":[{"last_name":"Hammer","id":"48077","first_name":"Manfred","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred"}],"date_created":"2018-08-01T10:44:00Z","status":"public","volume":204,"abstract":[{"text":"Frequently, optical integrated circuits combine elements (waveguide channels, cavities), the simulation of which is well established through mature numerical eigenproblem solvers. It remains to predict the interaction of these modes. We address this task by a general, “Hybrid” variant (HCMT) of Coupled Mode Theory. Using methods from finite-element numerics, the properties of a circuit are approximated by superpositions of eigen-solutions for its constituents, leading to quantitative, computationally cheap, and easily interpretable models.","lang":"eng"}],"user_id":"55706","page":"77-105","type":"book_chapter","citation":{"ieee":"M. Hammer, “Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory,” in Recent Trends in Computational Photonics, 204th ed., vol. 204, A. Agrawal, Ed. Springer, 2017, pp. 77–105.","short":"M. Hammer, in: A. Agrawal (Ed.), Recent Trends in Computational Photonics, 204th ed., Springer, 2017, pp. 77–105.","mla":"Hammer, Manfred. “Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory.” Recent Trends in Computational Photonics, edited by Arti Agrawal, 204th ed., vol. 204, Springer, 2017, pp. 77–105.","bibtex":"@inbook{Hammer_2017, edition={204}, series={ Springer Series in Optical Sciences book series}, title={Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory}, volume={204}, booktitle={Recent Trends in Computational Photonics}, publisher={Springer}, author={Hammer, Manfred}, editor={Agrawal, ArtiEditor}, year={2017}, pages={77–105}, collection={ Springer Series in Optical Sciences book series} }","apa":"Hammer, M. (2017). Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory. In A. Agrawal (Ed.), Recent Trends in Computational Photonics (204th ed., Vol. 204, pp. 77–105). Springer.","ama":"Hammer M. Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory. In: Agrawal A, ed. Recent Trends in Computational Photonics. Vol 204. 204th ed. Springer Series in Optical Sciences book series. Springer; 2017:77-105.","chicago":"Hammer, Manfred. “Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory.” In Recent Trends in Computational Photonics, edited by Arti Agrawal, 204th ed., 204:77–105. Springer Series in Optical Sciences Book Series. Springer, 2017."},"year":"2017","_id":"3743","intvolume":" 204"},{"abstract":[{"text":"The 3D implementation of a hybrid analytical/numerical variant of the coupled-mode theory is discussed.\r\nEigenmodes of the constituting dielectric channels are computed numerically. The frequency-domain\r\ncoupled-mode models then combine these into fully vectorial approximations for the optical electromagnetic\r\nfields of the composite structure. Following a discretization of amplitude functions by 1D finite elements, pro-\r\ncedures from the realm of finite-element numerics are applied to establish systems of linear equations for the then-\r\ndiscrete modal amplitudes. Examples substantiate the functioning of the technique and allow for some numerical\r\nassessment. The full 3D simulations are highly efficient in memory consumption, moderately demanding in com-\r\nputational time, and, in regimes of low radiative losses, sufficiently accurate for practical design. Our results\r\ninclude the perturbation of guided modes by changes of the refractive indices, the interaction of waves in parallel,\r\nhorizontally or vertically coupled straight waveguides, and a series of crossings of potentially overlapping channels\r\nwith fairly arbitrary relative positions and orientations.","lang":"eng"}],"article_type":"original","ddc":["530"],"user_id":"158","file_date_updated":"2018-09-03T14:09:04Z","publication":"Journal of the Optical Society of America B","keyword":["tet_topic_waveguide","tet_topic_numerics"],"author":[{"id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","first_name":"Manfred"},{"last_name":"Alhaddad","first_name":"Samer","full_name":"Alhaddad, Samer"},{"last_name":"Förstner","id":"158","first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862"}],"publisher":"The Optical Society","file":[{"relation":"main_file","content_type":"application/pdf","date_updated":"2018-09-03T14:09:04Z","creator":"hclaudia","file_id":"3829","file_size":5539592,"access_level":"open_access","date_created":"2018-08-07T09:46:13Z","file_name":"2017-02 Hammer_Hybrid coupled mode modelling in 3D_Perturbed and coupled channels and waveguide crossings_Coupled Mode Theory JOSA B.pdf"}],"volume":34,"date_created":"2018-08-07T08:40:41Z","status":"public","has_accepted_license":"1","urn":"38287","_id":"3828","intvolume":" 34","issue":"3","page":"613-624","citation":{"ieee":"M. Hammer, S. Alhaddad, and J. Förstner, “Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings,” Journal of the Optical Society of America B, vol. 34, no. 3, pp. 613–624, 2017.","short":"M. Hammer, S. Alhaddad, J. Förstner, Journal of the Optical Society of America B 34 (2017) 613–624.","mla":"Hammer, Manfred, et al. “Hybrid Coupled-Mode Modeling in 3D: Perturbed and Coupled Channels, and Waveguide Crossings.” Journal of the Optical Society of America B, vol. 34, no. 3, The Optical Society, 2017, pp. 613–24, doi:10.1364/josab.34.000613.","bibtex":"@article{Hammer_Alhaddad_Förstner_2017, title={Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings}, volume={34}, DOI={10.1364/josab.34.000613}, number={3}, journal={Journal of the Optical Society of America B}, publisher={The Optical Society}, author={Hammer, Manfred and Alhaddad, Samer and Förstner, Jens}, year={2017}, pages={613–624} }","apa":"Hammer, M., Alhaddad, S., & Förstner, J. (2017). Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings. Journal of the Optical Society of America B, 34(3), 613–624. https://doi.org/10.1364/josab.34.000613","ama":"Hammer M, Alhaddad S, Förstner J. Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings. Journal of the Optical Society of America B. 2017;34(3):613-624. doi:10.1364/josab.34.000613","chicago":"Hammer, Manfred, Samer Alhaddad, and Jens Förstner. “Hybrid Coupled-Mode Modeling in 3D: Perturbed and Coupled Channels, and Waveguide Crossings.” Journal of the Optical Society of America B 34, no. 3 (2017): 613–24. https://doi.org/10.1364/josab.34.000613."},"type":"journal_article","year":"2017","title":"Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings","department":[{"_id":"61"}],"publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]},"date_updated":"2022-01-06T06:59:38Z","doi":"10.1364/josab.34.000613","oa":"1","language":[{"iso":"eng"}]},{"title":"Spiral modes supported by circular dielectric tubes and tube segments","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"62","name":"TRR 142 - Subproject A5"}],"publication_status":"published","publication_identifier":{"issn":["0306-8919","1572-817X"]},"department":[{"_id":"61"}],"doi":"10.1007/s11082-017-1011-x","date_updated":"2022-01-06T06:59:39Z","language":[{"iso":"eng"}],"user_id":"158","ddc":["530"],"abstract":[{"text":"The modal properties of curved dielectric slab waveguides are investigated. We\r\nconsider quasi-confined, attenuated modes that propagate at oblique angles with respect to\r\nthe axis through the center of curvature. Our analytical model describes the transition from\r\nscalar 2-D TE/TM bend modes to lossless spiral waves at near-axis propagation angles,\r\nwith a continuum of vectorial attenuated spiral modes in between. Modal solutions are\r\ncharacterized in terms of directional wavenumbers and attenuation constants. Examples for\r\nvectorial mode profiles illustrate the effects of oblique wave propagation along the curved\r\nslab segments. For the regime of lossless spiral waves, the relation with the guided modes\r\nof corresponding dielectric tubes is demonstrated.","lang":"eng"}],"article_type":"original","date_created":"2018-08-07T09:52:20Z","status":"public","has_accepted_license":"1","volume":49,"file":[{"date_created":"2018-08-07T09:56:27Z","file_name":"2017-03 Ebers, Hammer_Spiral modes supported by circular dielectric tubes and tube segments.pdf","access_level":"request","file_size":2379736,"creator":"hclaudia","file_id":"3831","content_type":"application/pdf","date_updated":"2022-01-06T06:59:38Z","relation":"main_file"}],"keyword":["tet_topic_waveguide"],"publication":"Optical and Quantum Electronics","file_date_updated":"2022-01-06T06:59:38Z","author":[{"first_name":"Lena","full_name":"Ebers, Lena","last_name":"Ebers","id":"40428"},{"full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","first_name":"Manfred","id":"48077","last_name":"Hammer"},{"first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158"}],"publisher":"Springer Nature","issue":"4","urn":"38308","_id":"3830","intvolume":" 49","page":"49:176","citation":{"ieee":"L. Ebers, M. Hammer, and J. Förstner, “Spiral modes supported by circular dielectric tubes and tube segments,” Optical and Quantum Electronics, vol. 49, no. 4, p. 49:176, 2017.","short":"L. Ebers, M. Hammer, J. Förstner, Optical and Quantum Electronics 49 (2017) 49:176.","mla":"Ebers, Lena, et al. “Spiral Modes Supported by Circular Dielectric Tubes and Tube Segments.” Optical and Quantum Electronics, vol. 49, no. 4, Springer Nature, 2017, p. 49:176, doi:10.1007/s11082-017-1011-x.","bibtex":"@article{Ebers_Hammer_Förstner_2017, title={Spiral modes supported by circular dielectric tubes and tube segments}, volume={49}, DOI={10.1007/s11082-017-1011-x}, number={4}, journal={Optical and Quantum Electronics}, publisher={Springer Nature}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2017}, pages={49:176} }","ama":"Ebers L, Hammer M, Förstner J. Spiral modes supported by circular dielectric tubes and tube segments. Optical and Quantum Electronics. 2017;49(4):49:176. doi:10.1007/s11082-017-1011-x","apa":"Ebers, L., Hammer, M., & Förstner, J. (2017). Spiral modes supported by circular dielectric tubes and tube segments. Optical and Quantum Electronics, 49(4), 49:176. https://doi.org/10.1007/s11082-017-1011-x","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Spiral Modes Supported by Circular Dielectric Tubes and Tube Segments.” Optical and Quantum Electronics 49, no. 4 (2017): 49:176. https://doi.org/10.1007/s11082-017-1011-x."},"year":"2017","type":"journal_article"},{"ddc":["530"],"user_id":"158","publication":"Integrated Optics: Devices, Materials, and Technologies XX","keyword":["tet_topic_waveguide"],"file_date_updated":"2018-07-11T09:38:29Z","publisher":"SPIE","author":[{"first_name":"Andre","full_name":"Hildebrandt, Andre","last_name":"Hildebrandt"},{"last_name":"Alhaddad","id":"42456","first_name":"Samer","full_name":"Alhaddad, Samer"},{"first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077"},{"full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","first_name":"Jens","id":"158","last_name":"Förstner"}],"file":[{"content_type":"application/pdf","date_updated":"2018-07-11T09:38:29Z","relation":"main_file","success":1,"file_size":1239213,"creator":"fossie","file_id":"3544","access_level":"closed","file_name":"2016-02 Hildebrandt SPIE OPTO 2016.pdf","date_created":"2018-07-11T09:38:29Z"}],"date_created":"2018-07-11T09:35:06Z","status":"public","has_accepted_license":"1","_id":"3543","type":"conference","citation":{"bibtex":"@inproceedings{Hildebrandt_Alhaddad_Hammer_Förstner_2016, title={Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits}, DOI={10.1117/12.2214460}, booktitle={Integrated Optics: Devices, Materials, and Technologies XX}, publisher={SPIE}, author={Hildebrandt, Andre and Alhaddad, Samer and Hammer, Manfred and Förstner, Jens}, editor={Broquin, Jean-Emmanuel and Nunzi Conti, GualtieroEditors}, year={2016} }","mla":"Hildebrandt, Andre, et al. “Oblique Incidence of Semi-Guided Waves on Step-like Folds in Planar Dielectric Slabs: Lossless Vertical Interconnects in 3D Integrated Photonic Circuits.” Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti, SPIE, 2016, doi:10.1117/12.2214460.","apa":"Hildebrandt, A., Alhaddad, S., Hammer, M., & Förstner, J. (2016). Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits. In J.-E. Broquin & G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX. SPIE. https://doi.org/10.1117/12.2214460","ama":"Hildebrandt A, Alhaddad S, Hammer M, Förstner J. Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits. In: Broquin J-E, Nunzi Conti G, eds. Integrated Optics: Devices, Materials, and Technologies XX. SPIE; 2016. doi:10.1117/12.2214460","chicago":"Hildebrandt, Andre, Samer Alhaddad, Manfred Hammer, and Jens Förstner. “Oblique Incidence of Semi-Guided Waves on Step-like Folds in Planar Dielectric Slabs: Lossless Vertical Interconnects in 3D Integrated Photonic Circuits.” In Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti. SPIE, 2016. https://doi.org/10.1117/12.2214460.","ieee":"A. Hildebrandt, S. Alhaddad, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits,” in Integrated Optics: Devices, Materials, and Technologies XX, 2016.","short":"A. Hildebrandt, S. Alhaddad, M. Hammer, J. Förstner, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX, SPIE, 2016."},"year":"2016","title":"Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"publication_status":"published","editor":[{"last_name":"Broquin","full_name":"Broquin, Jean-Emmanuel","first_name":"Jean-Emmanuel"},{"full_name":"Nunzi Conti, Gualtiero","first_name":"Gualtiero","last_name":"Nunzi Conti"}],"date_updated":"2022-01-06T06:59:23Z","doi":"10.1117/12.2214460","language":[{"iso":"eng"}]},{"doi":"10.1117/12.2214331","date_updated":"2022-01-06T06:59:56Z","language":[{"iso":"eng"}],"title":"Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling","publication_status":"published","editor":[{"first_name":"Jean-Emmanuel","full_name":"Broquin, Jean-Emmanuel","last_name":"Broquin"},{"first_name":"Gualtiero","full_name":"Nunzi Conti, Gualtiero","last_name":"Nunzi Conti"}],"department":[{"_id":"61"}],"issue":"9750","conference":{"location":"San Francisco, USA","name":"Photonics West 2016/OPTO 2016"},"_id":"3934","page":"975018-975018-8 ","citation":{"short":"M. Hammer, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX, SPIE, 2016, pp. 975018-975018–8.","ieee":"M. Hammer, “Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling,” in Integrated Optics: Devices, Materials, and Technologies XX, San Francisco, USA, 2016, no. 9750, pp. 975018-975018–8.","ama":"Hammer M. Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling. In: Broquin J-E, Nunzi Conti G, eds. Integrated Optics: Devices, Materials, and Technologies XX. SPIE; 2016:975018-975018-8. doi:10.1117/12.2214331","apa":"Hammer, M. (2016). Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling. In J.-E. Broquin & G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX (pp. 975018-975018–8). San Francisco, USA: SPIE. https://doi.org/10.1117/12.2214331","chicago":"Hammer, Manfred. “Wave Interaction in Photonic Integrated Circuits: Hybrid Analytical / Numerical Coupled Mode Modeling.” In Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti, 975018-975018–8. SPIE, 2016. https://doi.org/10.1117/12.2214331.","mla":"Hammer, Manfred. “Wave Interaction in Photonic Integrated Circuits: Hybrid Analytical / Numerical Coupled Mode Modeling.” Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti, no. 9750, SPIE, 2016, pp. 975018-975018–8, doi:10.1117/12.2214331.","bibtex":"@inproceedings{Hammer_2016, title={Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling}, DOI={10.1117/12.2214331}, number={9750}, booktitle={Integrated Optics: Devices, Materials, and Technologies XX}, publisher={SPIE}, author={Hammer, Manfred}, editor={Broquin, Jean-Emmanuel and Nunzi Conti, GualtieroEditors}, year={2016}, pages={975018-975018–8} }"},"year":"2016","type":"conference","user_id":"55706","abstract":[{"lang":"eng","text":"Typical optical integrated circuits combine elements, like straight and curved waveguides, or cavities, the simulation and design of which is well established through numerical eigenproblem-solvers. It remains to predict the interaction of these modes. We address this task by a ”Hybrid” variant (HCMT) of Coupled Mode Theory. Using methods from finite-element numerics, the optical properties of a circuit are approximated by superpositions of eigen-solutions for its constituents, leading to quantitative, low-dimensional, and interpretable models in the frequency domain. Spectral scans are complemented by the direct computation of supermode properties (spectral positions and linewidths, coupling-induced phase shifts). This contribution outlines the theoretical background, and discusses briefly limitations and implementational details, with the help of an example of a 2-D coupled-resonator-optical-waveguide configuration."}],"date_created":"2018-08-20T09:25:13Z","status":"public","keyword":["tet_topic_waveguide","tet_topic_numerics"],"publication":"Integrated Optics: Devices, Materials, and Technologies XX","author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","last_name":"Hammer","id":"48077"}],"publisher":"SPIE"},{"_id":"3845","intvolume":" 365","citation":{"short":"F. Civitci, M. Hammer, H.J.W.M. Hoekstra, Optics Communications 365 (2015) 29–37.","ieee":"F. Civitci, M. Hammer, and H. J. W. M. Hoekstra, “Planar prism spectrometer based on adiabatically connected waveguiding slabs,” Optics Communications, vol. 365, pp. 29–37, 2015.","chicago":"Civitci, F., Manfred Hammer, and H.J.W.M. Hoekstra. “Planar Prism Spectrometer Based on Adiabatically Connected Waveguiding Slabs.” Optics Communications 365 (2015): 29–37. https://doi.org/10.1016/j.optcom.2015.11.066.","apa":"Civitci, F., Hammer, M., & Hoekstra, H. J. W. M. (2015). Planar prism spectrometer based on adiabatically connected waveguiding slabs. Optics Communications, 365, 29–37. https://doi.org/10.1016/j.optcom.2015.11.066","ama":"Civitci F, Hammer M, Hoekstra HJWM. Planar prism spectrometer based on adiabatically connected waveguiding slabs. Optics Communications. 2015;365:29-37. doi:10.1016/j.optcom.2015.11.066","mla":"Civitci, F., et al. “Planar Prism Spectrometer Based on Adiabatically Connected Waveguiding Slabs.” Optics Communications, vol. 365, Elsevier BV, 2015, pp. 29–37, doi:10.1016/j.optcom.2015.11.066.","bibtex":"@article{Civitci_Hammer_Hoekstra_2015, title={Planar prism spectrometer based on adiabatically connected waveguiding slabs}, volume={365}, DOI={10.1016/j.optcom.2015.11.066}, journal={Optics Communications}, publisher={Elsevier BV}, author={Civitci, F. and Hammer, Manfred and Hoekstra, H.J.W.M.}, year={2015}, pages={29–37} }"},"type":"journal_article","year":"2015","page":"29-37","ddc":["530"],"user_id":"55706","article_type":"original","abstract":[{"text":"The device principle of a prism-based on-chip spectrometer for TE polarization is introduced. The spectrometer exploits the modal dispersion in planar waveguides in a layout with slab regions having two different thicknesses of the guiding layer. The set-up uses parabolic mirrors, for the collimation of light of the input waveguide and focusing of the light to the receiver waveguides, which relies on total internal reflection at the interface between two such regions. These regions are connected adiabatically to prevent unwanted mode conversion and loss at the edges of the prism. The structure can be fabricated with two wet etching steps. The paper presents basic theory and a general approach for device optimization. The latter is illustrated with a numerical example assuming SiON technology.","lang":"eng"}],"volume":365,"has_accepted_license":"1","status":"public","date_created":"2018-08-08T10:27:57Z","author":[{"last_name":"Civitci","first_name":"F.","full_name":"Civitci, F."},{"full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","first_name":"Manfred","id":"48077","last_name":"Hammer"},{"last_name":"Hoekstra","full_name":"Hoekstra, H.J.W.M.","first_name":"H.J.W.M."}],"publisher":"Elsevier BV","keyword":["tet_topic_waveguide"],"publication":"Optics Communications","file_date_updated":"2018-08-08T10:31:23Z","file":[{"file_name":"2016 Hammer_Planar prism spectrometer based on adiabatically connected waveguiding slabs.pdf","date_created":"2018-08-08T10:31:23Z","access_level":"closed","file_id":"3846","creator":"hclaudia","file_size":1542539,"relation":"main_file","success":1,"content_type":"application/pdf","date_updated":"2018-08-08T10:31:23Z"}],"doi":"10.1016/j.optcom.2015.11.066","date_updated":"2022-01-06T06:59:44Z","language":[{"iso":"eng"}],"title":"Planar prism spectrometer based on adiabatically connected waveguiding slabs","publication_identifier":{"issn":["0030-4018"]},"publication_status":"published","department":[{"_id":"61"}]},{"doi":"10.1109/jlt.2015.2502431","date_updated":"2022-01-06T06:59:44Z","language":[{"iso":"eng"}],"title":"Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence","publication_status":"published","publication_identifier":{"issn":["0733-8724","1558-2213"]},"department":[{"_id":"61"}],"issue":"3","intvolume":" 34","_id":"3847","page":"997-1005","type":"journal_article","year":"2015","citation":{"bibtex":"@article{Hammer_Hildebrandt_Förstner_2015, title={Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence}, volume={34}, DOI={10.1109/jlt.2015.2502431}, number={3}, journal={Journal of Lightwave Technology}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Hammer, Manfred and Hildebrandt, Andre and Förstner, Jens}, year={2015}, pages={997–1005} }","mla":"Hammer, Manfred, et al. “Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence.” Journal of Lightwave Technology, vol. 34, no. 3, Institute of Electrical and Electronics Engineers (IEEE), 2015, pp. 997–1005, doi:10.1109/jlt.2015.2502431.","chicago":"Hammer, Manfred, Andre Hildebrandt, and Jens Förstner. “Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence.” Journal of Lightwave Technology 34, no. 3 (2015): 997–1005. https://doi.org/10.1109/jlt.2015.2502431.","apa":"Hammer, M., Hildebrandt, A., & Förstner, J. (2015). Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence. Journal of Lightwave Technology, 34(3), 997–1005. https://doi.org/10.1109/jlt.2015.2502431","ama":"Hammer M, Hildebrandt A, Förstner J. Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence. Journal of Lightwave Technology. 2015;34(3):997-1005. doi:10.1109/jlt.2015.2502431","ieee":"M. Hammer, A. Hildebrandt, and J. Förstner, “Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence,” Journal of Lightwave Technology, vol. 34, no. 3, pp. 997–1005, 2015.","short":"M. Hammer, A. Hildebrandt, J. Förstner, Journal of Lightwave Technology 34 (2015) 997–1005."},"ddc":["530"],"user_id":"158","abstract":[{"text":"Sheets of slab waveguides with sharp corners are investigated. By means of rigorous\r\nnumerical experiments, we look at oblique incidence of semi-guided plane waves. Radiation losses\r\nvanish beyond a certain critical angle of incidence. One can thus realize lossless propagation through\r\n90-degree corner configurations, where the remaining guided waves are still subject to pronounced\r\nreflection and polarization conversion. A system of two corners can be viewed as a structure akin to\r\na Fabry-Perot-interferometer. By adjusting the distance between the two partial reflectors, here the\r\n90-degree corners, one identifies step-like configurations that transmit the semi-guided plane waves\r\nwithout radiation losses, and virtually without reflections. Simulations of semi-guided beams with\r\nin-plane wide Gaussian profiles show that the effect survives in a true 3-D framework.","lang":"eng"}],"article_type":"original","volume":34,"date_created":"2018-08-08T10:34:34Z","has_accepted_license":"1","status":"public","keyword":["tet_topic_waveguide"],"publication":"Journal of Lightwave Technology","file_date_updated":"2018-09-03T14:43:26Z","author":[{"last_name":"Hammer","id":"48077","first_name":"Manfred","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348"},{"last_name":"Hildebrandt","full_name":"Hildebrandt, Andre","first_name":"Andre"},{"id":"158","last_name":"Förstner","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","file":[{"content_type":"application/pdf","date_updated":"2018-09-03T14:43:26Z","relation":"main_file","file_size":606723,"file_id":"3848","creator":"hclaudia","access_level":"local","file_name":"2016 Hammer,Hildebrandt,Förstner_Full resonant transmission of semi-guided planar waves.pdf","date_created":"2018-08-08T10:37:19Z"}]},{"publication_identifier":{"issn":["0146-9592","1539-4794"]},"publication_status":"published","department":[{"_id":"61"}],"title":"How planar optical waves can be made to climb dielectric steps","language":[{"iso":"eng"}],"oa":"1","doi":"10.1364/ol.40.003711","date_updated":"2022-01-06T06:59:51Z","date_created":"2018-08-13T09:39:06Z","has_accepted_license":"1","status":"public","volume":40,"file":[{"access_level":"open_access","date_created":"2018-08-13T09:41:32Z","file_name":"2015-07 Hammer,Hildebrandt,Förstner_How planar optical waves can be made to climb dielectric steps_Optics Letter.pdf","relation":"main_file","date_updated":"2018-09-04T19:35:48Z","content_type":"application/pdf","creator":"hclaudia","file_id":"3895","file_size":1504149}],"keyword":["tet_topic_waveguide"],"publication":"Optics Letters","file_date_updated":"2018-09-04T19:35:48Z","publisher":"The Optical Society","author":[{"id":"48077","last_name":"Hammer","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"full_name":"Hildebrandt, Andre","first_name":"Andre","last_name":"Hildebrandt"},{"first_name":"Jens","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158"}],"user_id":"158","ddc":["530"],"abstract":[{"lang":"eng","text":"We show how to optically connect guiding layers at different elevations in a 3-D integrated photonic circuit. Transfer of\r\noptical power carried by planar, semi-guided waves is possible without reflections or radiation losses, and over large\r\nvertical distances. This functionality is realized through simple step-like folds of high-contrast dielectric slab waveguides, in combination with oblique wave incidence, and fulfilling a resonance condition. Radiation losses vanish, and polarization conversion is suppressed for TE wave incidence beyond certain critical angles. This can be understood by fundamental arguments resting on a version of Snell’s law. The two 90° corners of a step act as identical partial reflectors in a Fabry–Perot-like resonator setup. By selecting the step height, i.e., the distance between the reflectors, one realizes resonant states with full transmission. Rigorous quasi-analytical simulations\r\nfor typical silicon/silica parameters demonstrate the functioning. Combinations of several step junctions can lead\r\nto other types of optical on-chip connects, e.g., U-turn- or bridge-like configurations."}],"article_type":"original","page":"3711-3714","type":"journal_article","citation":{"mla":"Hammer, Manfred, et al. “How Planar Optical Waves Can Be Made to Climb Dielectric Steps.” Optics Letters, vol. 40, no. 16, The Optical Society, 2015, pp. 3711–14, doi:10.1364/ol.40.003711.","bibtex":"@article{Hammer_Hildebrandt_Förstner_2015, title={How planar optical waves can be made to climb dielectric steps}, volume={40}, DOI={10.1364/ol.40.003711}, number={16}, journal={Optics Letters}, publisher={The Optical Society}, author={Hammer, Manfred and Hildebrandt, Andre and Förstner, Jens}, year={2015}, pages={3711–3714} }","chicago":"Hammer, Manfred, Andre Hildebrandt, and Jens Förstner. “How Planar Optical Waves Can Be Made to Climb Dielectric Steps.” Optics Letters 40, no. 16 (2015): 3711–14. https://doi.org/10.1364/ol.40.003711.","apa":"Hammer, M., Hildebrandt, A., & Förstner, J. (2015). How planar optical waves can be made to climb dielectric steps. Optics Letters, 40(16), 3711–3714. https://doi.org/10.1364/ol.40.003711","ama":"Hammer M, Hildebrandt A, Förstner J. How planar optical waves can be made to climb dielectric steps. Optics Letters. 2015;40(16):3711-3714. doi:10.1364/ol.40.003711","ieee":"M. Hammer, A. Hildebrandt, and J. Förstner, “How planar optical waves can be made to climb dielectric steps,” Optics Letters, vol. 40, no. 16, pp. 3711–3714, 2015.","short":"M. Hammer, A. Hildebrandt, J. Förstner, Optics Letters 40 (2015) 3711–3714."},"year":"2015","issue":"16","urn":"38942","_id":"3894","intvolume":" 40"},{"language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:59:50Z","doi":"10.1016/j.optcom.2014.09.087","department":[{"_id":"61"}],"publication_status":"published","publication_identifier":{"issn":["0030-4018"]},"title":"Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver","page":"447-456","year":"2014","citation":{"bibtex":"@article{Hammer_2014, title={Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver}, volume={338}, DOI={10.1016/j.optcom.2014.09.087}, journal={Optics Communications}, publisher={Elsevier BV}, author={Hammer, Manfred}, year={2014}, pages={447–456} }","mla":"Hammer, Manfred. “Oblique Incidence of Semi-Guided Waves on Rectangular Slab Waveguide Discontinuities: A Vectorial QUEP Solver.” Optics Communications, vol. 338, Elsevier BV, 2014, pp. 447–56, doi:10.1016/j.optcom.2014.09.087.","chicago":"Hammer, Manfred. “Oblique Incidence of Semi-Guided Waves on Rectangular Slab Waveguide Discontinuities: A Vectorial QUEP Solver.” Optics Communications 338 (2014): 447–56. https://doi.org/10.1016/j.optcom.2014.09.087.","ama":"Hammer M. Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver. Optics Communications. 2014;338:447-456. doi:10.1016/j.optcom.2014.09.087","apa":"Hammer, M. (2014). Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver. Optics Communications, 338, 447–456. https://doi.org/10.1016/j.optcom.2014.09.087","ieee":"M. Hammer, “Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver,” Optics Communications, vol. 338, pp. 447–456, 2014.","short":"M. Hammer, Optics Communications 338 (2014) 447–456."},"type":"journal_article","_id":"3890","intvolume":" 338","file_date_updated":"2018-08-13T09:29:14Z","publication":"Optics Communications","keyword":["tet_topic_waveguide","tet_topic_numerics"],"publisher":"Elsevier BV","author":[{"full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","first_name":"Manfred","id":"48077","last_name":"Hammer"}],"file":[{"file_name":"2015 Hammer_Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities_A vectorial QUEP solver_Optics communications.pdf","date_created":"2018-08-13T09:29:14Z","access_level":"closed","file_size":1872449,"file_id":"3891","creator":"hclaudia","date_updated":"2018-08-13T09:29:14Z","content_type":"application/pdf","success":1,"relation":"main_file"}],"volume":338,"date_created":"2018-08-13T09:28:01Z","has_accepted_license":"1","status":"public","abstract":[{"lang":"eng","text":"The incidenceofthin-film-guided, in-planeunguidedwavesatobliqueanglesonstraightdiscontinuities of dielectricslabwaveguides,anearlyproblemofintegratedoptics,isbeingre-considered.The3-D frequencydomainMaxwellequationsreducetoaparametrizedinhomogeneousvectorialproblemona\r\n2-D computationaldomain,withtransparent-influx boundaryconditions.Weproposearigorousvec-\r\ntorial solverbasedonsimultaneousexpansionsintopolarizedlocalslabeigenmodesalongthetwo\r\northogonal crosssectioncoordinates(quadridirectionaleigenmodepropagationQUEP).Thequasi-ana-\r\nlytical schemeisapplicabletoconfigurations with — in principle — arbitrary crosssectiongeometries.\r\nExamples forahigh-contrastfacetofanasymmetricslabwaveguide,forthelateralexcitationofa\r\nchannel waveguide,andforastepdiscontinuitybetweenslabwaveguidesofdifferentthicknessesare\r\ndiscussed."}],"article_type":"original","ddc":["530"],"user_id":"55706"},{"_id":"3937","intvolume":" 31","issue":"7","article_number":"1561-1567","citation":{"ama":"Hoekstra HJWM, Hammer M. General relation for group delay and the relevance of group delay for refractometric sensing. Journal of the Optical Society of America B. 2014;31(7). doi:10.1364/josab.31.001561","apa":"Hoekstra, H. J. W. M., & Hammer, M. (2014). General relation for group delay and the relevance of group delay for refractometric sensing. Journal of the Optical Society of America B, 31(7). https://doi.org/10.1364/josab.31.001561","chicago":"Hoekstra, Hugo J. W. M., and Manfred Hammer. “General Relation for Group Delay and the Relevance of Group Delay for Refractometric Sensing.” Journal of the Optical Society of America B 31, no. 7 (2014). https://doi.org/10.1364/josab.31.001561.","mla":"Hoekstra, Hugo J. W. M., and Manfred Hammer. “General Relation for Group Delay and the Relevance of Group Delay for Refractometric Sensing.” Journal of the Optical Society of America B, vol. 31, no. 7, 1561–1567, The Optical Society, 2014, doi:10.1364/josab.31.001561.","bibtex":"@article{Hoekstra_Hammer_2014, title={General relation for group delay and the relevance of group delay for refractometric sensing}, volume={31}, DOI={10.1364/josab.31.001561}, number={71561–1567}, journal={Journal of the Optical Society of America B}, publisher={The Optical Society}, author={Hoekstra, Hugo J. W. M. and Hammer, Manfred}, year={2014} }","short":"H.J.W.M. Hoekstra, M. Hammer, Journal of the Optical Society of America B 31 (2014).","ieee":"H. J. W. M. Hoekstra and M. Hammer, “General relation for group delay and the relevance of group delay for refractometric sensing,” Journal of the Optical Society of America B, vol. 31, no. 7, 2014."},"type":"journal_article","year":"2014","article_type":"original","abstract":[{"lang":"eng","text":"The relevance of our definition for sensitivity in refractometric sensing, being the relative change in the transmittance\r\nof a certain output channel of an optical device over the change in the refractive index of the probed\r\nmaterial, is discussed. It is compared to one based on spectral shift per refractive index unit change. Further, there\r\nis discussion on how group delay and sensitivity are interrelated and can be converted into each other and which\r\nphysical quantities are relevant for high sensitivity. As a by-product of the theory presented, a general expression\r\nrelating group delay and the ratio of the time-averaged optical energy and the input power is presented."}],"user_id":"55706","ddc":["530"],"file":[{"file_id":"3938","creator":"hclaudia","file_size":364221,"success":1,"relation":"main_file","content_type":"application/pdf","date_updated":"2018-08-20T10:00:33Z","file_name":"2014_07_Hoekstra,Hammer_General relation for group delay and the relevance of group delay for refractometric sensing_OSA.pdf","date_created":"2018-08-20T10:00:33Z","access_level":"closed"}],"publisher":"The Optical Society","author":[{"last_name":"Hoekstra","first_name":"Hugo J. W. M.","full_name":"Hoekstra, Hugo J. W. M."},{"id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","first_name":"Manfred"}],"keyword":["tet_topic_waveguide"],"file_date_updated":"2018-08-20T10:00:33Z","publication":"Journal of the Optical Society of America B","status":"public","has_accepted_license":"1","date_created":"2018-08-20T09:59:35Z","volume":31,"date_updated":"2022-01-06T06:59:57Z","doi":"10.1364/josab.31.001561","language":[{"iso":"eng"}],"title":"General relation for group delay and the relevance of group delay for refractometric sensing","department":[{"_id":"61"}],"publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]}}]