[{"publication":"Semiconductor Science and Technology","type":"journal_article","status":"public","_id":"12930","project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - Subproject B1","_id":"66"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"department":[{"_id":"15"},{"_id":"230"},{"_id":"429"},{"_id":"287"}],"user_id":"20798","ddc":["530"],"article_number":"095009","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0268-1242","1361-6641"]},"publication_status":"published","issue":"9","year":"2019","intvolume":"        34","citation":{"bibtex":"@article{Köthemann_Weber_Lindner_Meier_2019, title={High-precision determination of silicon nanocrystals: optical spectroscopy versus electron microscopy}, volume={34}, DOI={<a href=\"https://doi.org/10.1088/1361-6641/ab3536\">10.1088/1361-6641/ab3536</a>}, number={9095009}, journal={Semiconductor Science and Technology}, author={Köthemann, Ronja and Weber, Nils and Lindner, Jörg K N and Meier, Cedrik}, year={2019} }","short":"R. Köthemann, N. Weber, J.K.N. Lindner, C. Meier, Semiconductor Science and Technology 34 (2019).","mla":"Köthemann, Ronja, et al. “High-Precision Determination of Silicon Nanocrystals: Optical Spectroscopy versus Electron Microscopy.” <i>Semiconductor Science and Technology</i>, vol. 34, no. 9, 095009, 2019, doi:<a href=\"https://doi.org/10.1088/1361-6641/ab3536\">10.1088/1361-6641/ab3536</a>.","apa":"Köthemann, R., Weber, N., Lindner, J. K. N., &#38; Meier, C. (2019). High-precision determination of silicon nanocrystals: optical spectroscopy versus electron microscopy. <i>Semiconductor Science and Technology</i>, <i>34</i>(9). <a href=\"https://doi.org/10.1088/1361-6641/ab3536\">https://doi.org/10.1088/1361-6641/ab3536</a>","ieee":"R. Köthemann, N. Weber, J. K. N. Lindner, and C. Meier, “High-precision determination of silicon nanocrystals: optical spectroscopy versus electron microscopy,” <i>Semiconductor Science and Technology</i>, vol. 34, no. 9, 2019.","chicago":"Köthemann, Ronja, Nils Weber, Jörg K N Lindner, and Cedrik Meier. “High-Precision Determination of Silicon Nanocrystals: Optical Spectroscopy versus Electron Microscopy.” <i>Semiconductor Science and Technology</i> 34, no. 9 (2019). <a href=\"https://doi.org/10.1088/1361-6641/ab3536\">https://doi.org/10.1088/1361-6641/ab3536</a>.","ama":"Köthemann R, Weber N, Lindner JKN, Meier C. High-precision determination of silicon nanocrystals: optical spectroscopy versus electron microscopy. <i>Semiconductor Science and Technology</i>. 2019;34(9). doi:<a href=\"https://doi.org/10.1088/1361-6641/ab3536\">10.1088/1361-6641/ab3536</a>"},"date_updated":"2022-01-06T06:51:26Z","volume":34,"date_created":"2019-08-14T11:12:33Z","author":[{"first_name":"Ronja","last_name":"Köthemann","full_name":"Köthemann, Ronja"},{"first_name":"Nils","full_name":"Weber, Nils","last_name":"Weber"},{"last_name":"Lindner","full_name":"Lindner, Jörg K N","first_name":"Jörg K N"},{"first_name":"Cedrik","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik","id":"20798"}],"title":"High-precision determination of silicon nanocrystals: optical spectroscopy versus electron microscopy","doi":"10.1088/1361-6641/ab3536"},{"type":"journal_article","status":"public","user_id":"158","department":[{"_id":"61"},{"_id":"230"}],"project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"75","name":"TRR 142 - Subproject C5"}],"_id":"14990","file_date_updated":"2019-11-15T15:33:26Z","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["2578-7519"]},"citation":{"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>","short":"L. Ebers, M. Hammer, M.B. Berkemeier, A. Menzel, J. Förstner, OSA Continuum 2 (2019) 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>.","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} }","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.","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>"},"intvolume":"         2","page":"3288","author":[{"id":"40428","full_name":"Ebers, Lena","last_name":"Ebers","first_name":"Lena"},{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"full_name":"Berkemeier, Manuel B.","last_name":"Berkemeier","first_name":"Manuel B."},{"last_name":"Menzel","full_name":"Menzel, Alexander","first_name":"Alexander"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"volume":2,"date_updated":"2022-01-06T06:52:13Z","oa":"1","main_file_link":[{"url":"https://www.osapublishing.org/osac/abstract.cfm?uri=osac-2-11-3288","open_access":"1"}],"doi":"10.1364/osac.2.003288","publication":"OSA Continuum","file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2019-11-15T15:33:26Z","date_created":"2019-11-15T15:33:26Z","creator":"fossie","file_size":882779,"file_name":"2019-11-12 Ebers - Add Drop Filter - OSA continuum (official version).pdf","file_id":"15012","access_level":"open_access"}],"abstract":[{"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.","lang":"eng"}],"language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_waveguides"],"year":"2019","date_created":"2019-11-15T07:21:20Z","title":"Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter"},{"status":"public","type":"patent","file_date_updated":"2019-02-15T10:21:08Z","_id":"7720","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"}],"user_id":"158","page":"9","citation":{"apa":"Hammer, M., Förstner, J., &#38; Ebers, L. (2019). <i>Optical transition between two optical waveguides layer and method for transmitting light</i>.","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).","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.","ama":"Hammer M, Förstner J, Ebers L. Optical transition between two optical waveguides layer and method for transmitting light. Published online 2019."},"has_accepted_license":"1","ipn":"DE102018108110B3","application_number":"102018108110","main_file_link":[{"url":"https://patents.google.com/patent/DE102018108110B3/en"}],"ipc":"G02B 6/26","date_updated":"2022-04-27T07:35:46Z","author":[{"first_name":"Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"},{"last_name":"Ebers","full_name":"Ebers, Lena","id":"40428","first_name":"Lena"}],"abstract":[{"lang":"ger","text":"Die Erfindung betrifft einen optischen Übergang zwischen zwei optischen Schichtwellenleitern. Dazu ist eine Anordnung vorgesehen aus einem ersten optischen Schichtwellenleiter (2) und einem zweiten optischen Schichtwellenleiter (3), wobei der erste optische Schichtwellenleiter (2) und der zweite optische Schichtwellenleiter (3) voneinander verschiedene über ihre jeweilige Länge konstante Dicken (d, r) aufweisen, der erste optische Schichtwellenleiter (2) mit dem zweiten optischen Schichtwellenleiter (3) mittels einer optischen Schichtwellenleiterstruktur (4) verbunden ist, die über ihre gesamte Länge (w) eine Dicke (h) aufweist, die zwischen der Dicke (d) des ersten optischen Schichtwellenleiters (2) und der Dicke (r) des zweiten optischen Schichtwellenleiters (3) liegt. Erfindungsgemäß ist die Dicke (h) der optischen Schichtwellenleiterstruktur (4) über die gesamte Länge (w) der optischen Schichtwellenleiterstruktur (4) konstant. Damit wird eine Möglichkeit für einen effizienten und mit geringen Verlusten behafteten Übergang zwischen zwei optischen Schichtwellenleitern mit unterschiedlicher Dicke bereitgestellt. "},{"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"}],"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}],"keyword":["tet_topic_waveguides"],"ddc":["530"],"publication_date":"2019-01-31","year":"2019","application_date":"2018-04-05","title":"Optical transition between two optical waveguides layer and method for transmitting light","date_created":"2019-02-15T10:25:59Z"},{"publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"issue":"15","year":"2019","citation":{"apa":"Vondran, J., Spitzer, F., Bayer, M., Akimov, I. A., Trautmann, A., Reichelt, M., Meier, C., Weber, N., Meier, T., André, R., &#38; Mariette, H. (2019). Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure. <i>Physical Review B</i>, <i>100</i>(15), 155308. <a href=\"https://doi.org/10.1103/physrevb.100.155308\">https://doi.org/10.1103/physrevb.100.155308</a>","mla":"Vondran, J., et al. “Spatially Asymmetric Transients of Propagating Exciton-Polariton Modes in a Planar CdZnTe/CdMgTe Guiding Structure.” <i>Physical Review B</i>, vol. 100, no. 15, 2019, p. 155308, doi:<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>.","short":"J. Vondran, F. Spitzer, M. Bayer, I.A. Akimov, A. Trautmann, M. Reichelt, C. Meier, N. Weber, T. Meier, R. André, H. Mariette, Physical Review B 100 (2019) 155308.","bibtex":"@article{Vondran_Spitzer_Bayer_Akimov_Trautmann_Reichelt_Meier_Weber_Meier_André_et al._2019, title={Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure}, volume={100}, DOI={<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>}, number={15}, journal={Physical Review B}, author={Vondran, J. and Spitzer, F. and Bayer, M. and Akimov, I. A. and Trautmann, Alexander and Reichelt, Matthias and Meier, Cedrik and Weber, N. and Meier, Torsten and André, R. and et al.}, year={2019}, pages={155308} }","ama":"Vondran J, Spitzer F, Bayer M, et al. Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure. <i>Physical Review B</i>. 2019;100(15):155308. doi:<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>","chicago":"Vondran, J., F. Spitzer, M. Bayer, I. A. Akimov, Alexander Trautmann, Matthias Reichelt, Cedrik Meier, et al. “Spatially Asymmetric Transients of Propagating Exciton-Polariton Modes in a Planar CdZnTe/CdMgTe Guiding Structure.” <i>Physical Review B</i> 100, no. 15 (2019): 155308. <a href=\"https://doi.org/10.1103/physrevb.100.155308\">https://doi.org/10.1103/physrevb.100.155308</a>.","ieee":"J. Vondran <i>et al.</i>, “Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure,” <i>Physical Review B</i>, vol. 100, no. 15, p. 155308, 2019, doi: <a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>."},"page":"155308","intvolume":"       100","date_updated":"2023-04-16T01:54:53Z","author":[{"last_name":"Vondran","full_name":"Vondran, J.","first_name":"J."},{"full_name":"Spitzer, F.","last_name":"Spitzer","first_name":"F."},{"full_name":"Bayer, M.","last_name":"Bayer","first_name":"M."},{"last_name":"Akimov","full_name":"Akimov, I. A.","first_name":"I. A."},{"first_name":"Alexander","last_name":"Trautmann","full_name":"Trautmann, Alexander","id":"38163"},{"first_name":"Matthias","last_name":"Reichelt","id":"138","full_name":"Reichelt, Matthias"},{"full_name":"Meier, Cedrik","id":"20798","orcid":"https://orcid.org/0000-0002-3787-3572","last_name":"Meier","first_name":"Cedrik"},{"first_name":"N.","last_name":"Weber","full_name":"Weber, N."},{"first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten","id":"344"},{"last_name":"André","full_name":"André, R.","first_name":"R."},{"first_name":"H.","last_name":"Mariette","full_name":"Mariette, H."}],"date_created":"2019-11-05T13:30:07Z","volume":100,"title":"Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure","doi":"10.1103/physrevb.100.155308","type":"journal_article","publication":"Physical Review B","status":"public","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area B","_id":"55"},{"_id":"66","name":"TRR 142 - Subproject B1"},{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - Subproject A2","_id":"59"}],"_id":"14544","user_id":"49063","department":[{"_id":"15"},{"_id":"230"},{"_id":"287"},{"_id":"35"},{"_id":"293"},{"_id":"170"},{"_id":"429"}],"language":[{"iso":"eng"}]},{"type":"journal_article","status":"public","_id":"10014","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - Project Area B"},{"name":"TRR 142 - Subproject B4","_id":"69"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"295"},{"_id":"296"},{"_id":"230"},{"_id":"429"},{"_id":"170"},{"_id":"35"}],"user_id":"16199","article_type":"original","article_number":"054401","isi":"1","file_date_updated":"2020-08-30T14:34:33Z","has_accepted_license":"1","publication_identifier":{"eissn":["2475-9953"]},"publication_status":"published","intvolume":"         3","citation":{"ama":"Schmidt F, Riefer A, Schmidt WG, et al. Quasiparticle and excitonic effects in the optical response of KNbO3. <i>Physical Review Materials</i>. 2019;3(5). doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">10.1103/PhysRevMaterials.3.054401</a>","chicago":"Schmidt, Falko, Arthur Riefer, Wolf Gero Schmidt, Arno Schindlmayr, Mirco Imlau, Florian Dobener, Nils Mengel, Sangam Chatterjee, and Simone Sanna. “Quasiparticle and Excitonic Effects in the Optical Response of KNbO3.” <i>Physical Review Materials</i> 3, no. 5 (2019). <a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">https://doi.org/10.1103/PhysRevMaterials.3.054401</a>.","ieee":"F. Schmidt <i>et al.</i>, “Quasiparticle and excitonic effects in the optical response of KNbO3,” <i>Physical Review Materials</i>, vol. 3, no. 5, Art. no. 054401, 2019, doi: <a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">10.1103/PhysRevMaterials.3.054401</a>.","apa":"Schmidt, F., Riefer, A., Schmidt, W. G., Schindlmayr, A., Imlau, M., Dobener, F., Mengel, N., Chatterjee, S., &#38; Sanna, S. (2019). Quasiparticle and excitonic effects in the optical response of KNbO3. <i>Physical Review Materials</i>, <i>3</i>(5), Article 054401. <a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">https://doi.org/10.1103/PhysRevMaterials.3.054401</a>","bibtex":"@article{Schmidt_Riefer_Schmidt_Schindlmayr_Imlau_Dobener_Mengel_Chatterjee_Sanna_2019, title={Quasiparticle and excitonic effects in the optical response of KNbO3}, volume={3}, DOI={<a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">10.1103/PhysRevMaterials.3.054401</a>}, number={5054401}, journal={Physical Review Materials}, publisher={American Physical Society}, author={Schmidt, Falko and Riefer, Arthur and Schmidt, Wolf Gero and Schindlmayr, Arno and Imlau, Mirco and Dobener, Florian and Mengel, Nils and Chatterjee, Sangam and Sanna, Simone}, year={2019} }","mla":"Schmidt, Falko, et al. “Quasiparticle and Excitonic Effects in the Optical Response of KNbO3.” <i>Physical Review Materials</i>, vol. 3, no. 5, 054401, American Physical Society, 2019, doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.3.054401\">10.1103/PhysRevMaterials.3.054401</a>.","short":"F. Schmidt, A. Riefer, W.G. Schmidt, A. Schindlmayr, M. Imlau, F. Dobener, N. Mengel, S. Chatterjee, S. Sanna, Physical Review Materials 3 (2019)."},"date_updated":"2023-04-20T14:20:33Z","oa":"1","volume":3,"author":[{"first_name":"Falko","full_name":"Schmidt, Falko","id":"35251","last_name":"Schmidt","orcid":"0000-0002-5071-5528"},{"first_name":"Arthur","last_name":"Riefer","full_name":"Riefer, Arthur"},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero","first_name":"Wolf Gero"},{"last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","id":"458","full_name":"Schindlmayr, Arno","first_name":"Arno"},{"first_name":"Mirco","last_name":"Imlau","full_name":"Imlau, Mirco"},{"last_name":"Dobener","full_name":"Dobener, Florian","first_name":"Florian"},{"last_name":"Mengel","full_name":"Mengel, Nils","first_name":"Nils"},{"first_name":"Sangam","last_name":"Chatterjee","full_name":"Chatterjee, Sangam"},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"}],"doi":"10.1103/PhysRevMaterials.3.054401","publication":"Physical Review Materials","abstract":[{"lang":"eng","text":"The cubic, tetragonal, and orthorhombic phase of potassium niobate (KNbO3) are studied based on density-functional theory. Starting from the relaxed atomic geometries, we analyze the influence of self-energy corrections on the electronic band structure within the GW approximation. We find that quasiparticle shifts widen the direct (indirect) band gap by 1.21 (1.44), 1.58 (1.55), and 1.67 (1.64) eV for the cubic, tetragonal, and orthorhombic phase, respectively. By solving the Bethe-Salpeter equation, we obtain the linear dielectric function with excitonic and local-field effects, which turn out to be essential for good agreement with experimental data. From our results, we extract an exciton binding energy of 0.6, 0.5, and 0.5 eV for the cubic, tetragonal, and orthorhombic phase, respectively. Furthermore, we investigate the nonlinear second-harmonic generation (SHG) both theoretically and experimentally. The frequency-dependent second-order polarization tensor of orthorhombic KNbO3 is measured for incoming photon energies between 1.2 and 1.6 eV. In addition, calculations within the independent-(quasi)particle approximation are performed for the tetragonal and orthorhombic phase. The novel experimental data are in excellent agreement with the quasiparticle calculations and resolve persistent discrepancies between earlier experimental measurements and ab initio results reported in the literature."}],"file":[{"content_type":"application/pdf","relation":"main_file","creator":"schindlm","date_created":"2020-08-27T19:05:54Z","date_updated":"2020-08-30T14:34:33Z","file_id":"18465","file_name":"PhysRevMaterials.3.054401.pdf","access_level":"open_access","title":"Quasiparticle and excitonic effects in the optical response of KNbO3","description":"© 2019 American Physical Society","file_size":1949504}],"external_id":{"isi":["000467044000003"]},"ddc":["530"],"language":[{"iso":"eng"}],"quality_controlled":"1","issue":"5","year":"2019","publisher":"American Physical Society","date_created":"2019-05-29T06:55:29Z","title":"Quasiparticle and excitonic effects in the optical response of KNbO3"},{"publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","intvolume":"        99","citation":{"bibtex":"@article{Nicholson_Puppin_Lücke_Gerstmann_Krenz_Schmidt_Rettig_Ernstorfer_Wolf_2019, title={Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy}, volume={99}, DOI={<a href=\"https://doi.org/10.1103/physrevb.99.155107\">10.1103/physrevb.99.155107</a>}, number={15155107}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Nicholson, C. W. and Puppin, M. and Lücke, A. and Gerstmann, Uwe and Krenz, Marvin and Schmidt, Wolf Gero and Rettig, L. and Ernstorfer, R. and Wolf, M.}, year={2019} }","mla":"Nicholson, C. W., et al. “Excited-State Band Mapping and Momentum-Resolved Ultrafast Population Dynamics in In/Si(111) Nanowires Investigated with XUV-Based Time- and Angle-Resolved Photoemission Spectroscopy.” <i>Physical Review B</i>, vol. 99, no. 15, 155107, American Physical Society (APS), 2019, doi:<a href=\"https://doi.org/10.1103/physrevb.99.155107\">10.1103/physrevb.99.155107</a>.","short":"C.W. Nicholson, M. Puppin, A. Lücke, U. Gerstmann, M. Krenz, W.G. Schmidt, L. Rettig, R. Ernstorfer, M. Wolf, Physical Review B 99 (2019).","apa":"Nicholson, C. W., Puppin, M., Lücke, A., Gerstmann, U., Krenz, M., Schmidt, W. G., Rettig, L., Ernstorfer, R., &#38; Wolf, M. (2019). Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy. <i>Physical Review B</i>, <i>99</i>(15), Article 155107. <a href=\"https://doi.org/10.1103/physrevb.99.155107\">https://doi.org/10.1103/physrevb.99.155107</a>","chicago":"Nicholson, C. W., M. Puppin, A. Lücke, Uwe Gerstmann, Marvin Krenz, Wolf Gero Schmidt, L. Rettig, R. Ernstorfer, and M. Wolf. “Excited-State Band Mapping and Momentum-Resolved Ultrafast Population Dynamics in In/Si(111) Nanowires Investigated with XUV-Based Time- and Angle-Resolved Photoemission Spectroscopy.” <i>Physical Review B</i> 99, no. 15 (2019). <a href=\"https://doi.org/10.1103/physrevb.99.155107\">https://doi.org/10.1103/physrevb.99.155107</a>.","ieee":"C. W. Nicholson <i>et al.</i>, “Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy,” <i>Physical Review B</i>, vol. 99, no. 15, Art. no. 155107, 2019, doi: <a href=\"https://doi.org/10.1103/physrevb.99.155107\">10.1103/physrevb.99.155107</a>.","ama":"Nicholson CW, Puppin M, Lücke A, et al. Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy. <i>Physical Review B</i>. 2019;99(15). doi:<a href=\"https://doi.org/10.1103/physrevb.99.155107\">10.1103/physrevb.99.155107</a>"},"volume":99,"author":[{"first_name":"C. W.","last_name":"Nicholson","full_name":"Nicholson, C. W."},{"last_name":"Puppin","full_name":"Puppin, M.","first_name":"M."},{"first_name":"A.","full_name":"Lücke, A.","last_name":"Lücke"},{"orcid":"0000-0002-4476-223X","last_name":"Gerstmann","id":"171","full_name":"Gerstmann, Uwe","first_name":"Uwe"},{"id":"52309","full_name":"Krenz, Marvin","last_name":"Krenz","first_name":"Marvin"},{"first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468"},{"full_name":"Rettig, L.","last_name":"Rettig","first_name":"L."},{"first_name":"R.","full_name":"Ernstorfer, R.","last_name":"Ernstorfer"},{"first_name":"M.","last_name":"Wolf","full_name":"Wolf, M."}],"date_updated":"2023-04-20T14:22:46Z","doi":"10.1103/physrevb.99.155107","type":"journal_article","status":"public","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"230"},{"_id":"35"}],"user_id":"16199","_id":"29746","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"_id":"69","name":"TRR 142 - B4: TRR 142 - Subproject B4"}],"article_number":"155107","issue":"15","year":"2019","date_created":"2022-02-03T15:26:06Z","publisher":"American Physical Society (APS)","title":"Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy","publication":"Physical Review B","language":[{"iso":"eng"}]},{"doi":"10.1021/acsomega.8b03271","title":"Water Splitting Reaction at Polar Lithium Niobate Surfaces","author":[{"first_name":"Christof","last_name":"Dues","full_name":"Dues, Christof"},{"first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468"},{"full_name":"Sanna, Simone","last_name":"Sanna","first_name":"Simone"}],"date_created":"2019-05-29T07:15:06Z","date_updated":"2023-04-20T14:21:28Z","citation":{"ama":"Dues C, Schmidt WG, Sanna S. Water Splitting Reaction at Polar Lithium Niobate Surfaces. <i>ACS Omega</i>. Published online 2019:3850-3859. doi:<a href=\"https://doi.org/10.1021/acsomega.8b03271\">10.1021/acsomega.8b03271</a>","chicago":"Dues, Christof, Wolf Gero Schmidt, and Simone Sanna. “Water Splitting Reaction at Polar Lithium Niobate Surfaces.” <i>ACS Omega</i>, 2019, 3850–59. <a href=\"https://doi.org/10.1021/acsomega.8b03271\">https://doi.org/10.1021/acsomega.8b03271</a>.","ieee":"C. Dues, W. G. Schmidt, and S. 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Water Splitting Reaction at Polar Lithium Niobate Surfaces. <i>ACS Omega</i>, 3850–3859. <a href=\"https://doi.org/10.1021/acsomega.8b03271\">https://doi.org/10.1021/acsomega.8b03271</a>"},"page":"3850-3859","year":"2019","publication_status":"published","publication_identifier":{"issn":["2470-1343","2470-1343"]},"language":[{"iso":"eng"}],"funded_apc":"1","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"35"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area B","_id":"55"},{"_id":"69","name":"TRR 142 - Subproject B4"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"10015","status":"public","type":"journal_article","publication":"ACS Omega"},{"doi":"10.1126/sciadv.aat1451","title":"Nonlinear integrated quantum electro-optic circuits","author":[{"first_name":"Kai-Hong","last_name":"Luo","orcid":"0000-0003-1008-4976","id":"36389","full_name":"Luo, Kai-Hong"},{"id":"38161","full_name":"Brauner, Sebastian","last_name":"Brauner","first_name":"Sebastian"},{"first_name":"Christof","id":"13244","full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"full_name":"Sharapova, Polina","id":"60286","last_name":"Sharapova","first_name":"Polina"},{"full_name":"Ricken, Raimund","last_name":"Ricken","first_name":"Raimund"},{"full_name":"Meier, Torsten","id":"344","orcid":"0000-0001-8864-2072","last_name":"Meier","first_name":"Torsten"},{"first_name":"Harald","id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann"},{"full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn","first_name":"Christine"}],"date_created":"2023-01-18T10:35:19Z","volume":5,"date_updated":"2023-04-21T11:25:39Z","publisher":"American Association for the Advancement of Science (AAAS)","citation":{"ama":"Luo K-H, Brauner S, Eigner C, et al. Nonlinear integrated quantum electro-optic circuits. <i>Science Advances</i>. 2019;5(1). doi:<a href=\"https://doi.org/10.1126/sciadv.aat1451\">10.1126/sciadv.aat1451</a>","ieee":"K.-H. Luo <i>et al.</i>, “Nonlinear integrated quantum electro-optic circuits,” <i>Science Advances</i>, vol. 5, no. 1, 2019, doi: <a href=\"https://doi.org/10.1126/sciadv.aat1451\">10.1126/sciadv.aat1451</a>.","chicago":"Luo, Kai-Hong, Sebastian Brauner, Christof Eigner, Polina Sharapova, Raimund Ricken, Torsten Meier, Harald Herrmann, and Christine Silberhorn. “Nonlinear Integrated Quantum Electro-Optic Circuits.” <i>Science Advances</i> 5, no. 1 (2019). <a href=\"https://doi.org/10.1126/sciadv.aat1451\">https://doi.org/10.1126/sciadv.aat1451</a>.","apa":"Luo, K.-H., Brauner, S., Eigner, C., Sharapova, P., Ricken, R., Meier, T., Herrmann, H., &#38; Silberhorn, C. (2019). Nonlinear integrated quantum electro-optic circuits. <i>Science Advances</i>, <i>5</i>(1). <a href=\"https://doi.org/10.1126/sciadv.aat1451\">https://doi.org/10.1126/sciadv.aat1451</a>","short":"K.-H. Luo, S. Brauner, C. Eigner, P. Sharapova, R. Ricken, T. Meier, H. Herrmann, C. Silberhorn, Science Advances 5 (2019).","mla":"Luo, Kai-Hong, et al. “Nonlinear Integrated Quantum Electro-Optic Circuits.” <i>Science Advances</i>, vol. 5, no. 1, American Association for the Advancement of Science (AAAS), 2019, doi:<a href=\"https://doi.org/10.1126/sciadv.aat1451\">10.1126/sciadv.aat1451</a>.","bibtex":"@article{Luo_Brauner_Eigner_Sharapova_Ricken_Meier_Herrmann_Silberhorn_2019, title={Nonlinear integrated quantum electro-optic circuits}, volume={5}, DOI={<a href=\"https://doi.org/10.1126/sciadv.aat1451\">10.1126/sciadv.aat1451</a>}, number={1}, journal={Science Advances}, publisher={American Association for the Advancement of Science (AAAS)}, author={Luo, Kai-Hong and Brauner, Sebastian and Eigner, Christof and Sharapova, Polina and Ricken, Raimund and Meier, Torsten and Herrmann, Harald and Silberhorn, Christine}, year={2019} }"},"intvolume":"         5","year":"2019","issue":"1","publication_status":"published","publication_identifier":{"issn":["2375-2548"]},"language":[{"iso":"eng"}],"keyword":["Multidisciplinary"],"user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"623"},{"_id":"429"},{"_id":"35"}],"project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - C2: TRR 142 - Subproject C2","_id":"72"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"37288","status":"public","abstract":[{"text":"<jats:p>An integrated chip with quantum state generation, active polarization manipulation, and precise time control is demonstrated.</jats:p>","lang":"eng"}],"type":"journal_article","publication":"Science Advances"},{"date_updated":"2023-04-21T11:26:51Z","author":[{"full_name":"Hannes, Wolf-Rüdiger","last_name":"Hannes","first_name":"Wolf-Rüdiger"},{"last_name":"Krauß-Kodytek","full_name":"Krauß-Kodytek, Laura","first_name":"Laura"},{"full_name":"Ruppert, Claudia","last_name":"Ruppert","first_name":"Claudia"},{"full_name":"Betz, Markus","last_name":"Betz","first_name":"Markus"},{"full_name":"Meier, Torsten","id":"344","orcid":"0000-0001-8864-2072","last_name":"Meier","first_name":"Torsten"}],"date_created":"2019-09-18T14:22:29Z","volume":10916,"title":"Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors","doi":"10.1117/12.2503539","publication_status":"published","publication_identifier":{"isbn":["9781510624740","9781510624757"]},"year":"2019","citation":{"apa":"Hannes, W.-R., Krauß-Kodytek, L., Ruppert, C., Betz, M., &#38; Meier, T. (2019). Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors. In M. Betz &#38; A. Y. Elezzabi (Eds.), <i>Ultrafast Phenomena and Nanophotonics XXIII</i> (No. 109160O; Vol. 10916). <a href=\"https://doi.org/10.1117/12.2503539\">https://doi.org/10.1117/12.2503539</a>","short":"W.-R. Hannes, L. Krauß-Kodytek, C. Ruppert, M. Betz, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXIII, 2019.","mla":"Hannes, Wolf-Rüdiger, et al. “Intensity-Dependent Degenerate and Non-Degenerate Nonlinear Optical Absorption of Direct-Gap Semiconductors.” <i>Ultrafast Phenomena and Nanophotonics XXIII</i>, edited by Markus Betz and Abdulhakem Y. Elezzabi, vol. 10916, 109160O, 2019, doi:<a href=\"https://doi.org/10.1117/12.2503539\">10.1117/12.2503539</a>.","bibtex":"@inproceedings{Hannes_Krauß-Kodytek_Ruppert_Betz_Meier_2019, series={SPIE Proceedings}, title={Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors}, volume={10916}, DOI={<a href=\"https://doi.org/10.1117/12.2503539\">10.1117/12.2503539</a>}, number={109160O}, booktitle={Ultrafast Phenomena and Nanophotonics XXIII}, author={Hannes, Wolf-Rüdiger and Krauß-Kodytek, Laura and Ruppert, Claudia and Betz, Markus and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2019}, collection={SPIE Proceedings} }","ieee":"W.-R. Hannes, L. Krauß-Kodytek, C. Ruppert, M. Betz, and T. Meier, “Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors,” in <i>Ultrafast Phenomena and Nanophotonics XXIII</i>, 2019, vol. 10916, doi: <a href=\"https://doi.org/10.1117/12.2503539\">10.1117/12.2503539</a>.","chicago":"Hannes, Wolf-Rüdiger, Laura Krauß-Kodytek, Claudia Ruppert, Markus Betz, and Torsten Meier. “Intensity-Dependent Degenerate and Non-Degenerate Nonlinear Optical Absorption of Direct-Gap Semiconductors.” In <i>Ultrafast Phenomena and Nanophotonics XXIII</i>, edited by Markus Betz and Abdulhakem Y. Elezzabi, Vol. 10916. SPIE Proceedings, 2019. <a href=\"https://doi.org/10.1117/12.2503539\">https://doi.org/10.1117/12.2503539</a>.","ama":"Hannes W-R, Krauß-Kodytek L, Ruppert C, Betz M, Meier T. Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors. In: Betz M, Elezzabi AY, eds. <i>Ultrafast Phenomena and Nanophotonics XXIII</i>. Vol 10916. SPIE Proceedings. ; 2019. doi:<a href=\"https://doi.org/10.1117/12.2503539\">10.1117/12.2503539</a>"},"intvolume":"     10916","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"TRR 142","_id":"53"},{"_id":"54","name":"TRR 142 - Project Area A"},{"_id":"64","name":"TRR 142 - Subproject A7"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"13285","series_title":"SPIE Proceedings","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"230"}],"article_number":"109160O","language":[{"iso":"eng"}],"type":"conference","publication":"Ultrafast Phenomena and Nanophotonics XXIII","editor":[{"full_name":"Betz, Markus","last_name":"Betz","first_name":"Markus"},{"full_name":"Elezzabi, Abdulhakem Y.","last_name":"Elezzabi","first_name":"Abdulhakem Y."}],"status":"public"},{"issue":"12","publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"citation":{"ama":"Hannes W-R, Meier T. Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model. <i>Physical Review B</i>. 2019;99(12). doi:<a href=\"https://doi.org/10.1103/physrevb.99.125301\">10.1103/physrevb.99.125301</a>","chicago":"Hannes, Wolf-Rüdiger, and Torsten Meier. “Higher-Order Contributions and Nonperturbative Effects in the Nondegenerate Nonlinear Optical Absorption of Semiconductors Using a Two-Band Model.” <i>Physical Review B</i> 99, no. 12 (2019). <a href=\"https://doi.org/10.1103/physrevb.99.125301\">https://doi.org/10.1103/physrevb.99.125301</a>.","ieee":"W.-R. Hannes and T. Meier, “Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model,” <i>Physical Review B</i>, vol. 99, no. 12, Art. no. 125301, 2019, doi: <a href=\"https://doi.org/10.1103/physrevb.99.125301\">10.1103/physrevb.99.125301</a>.","apa":"Hannes, W.-R., &#38; Meier, T. (2019). Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model. <i>Physical Review B</i>, <i>99</i>(12), Article 125301. <a href=\"https://doi.org/10.1103/physrevb.99.125301\">https://doi.org/10.1103/physrevb.99.125301</a>","mla":"Hannes, Wolf-Rüdiger, and Torsten Meier. “Higher-Order Contributions and Nonperturbative Effects in the Nondegenerate Nonlinear Optical Absorption of Semiconductors Using a Two-Band Model.” <i>Physical Review B</i>, vol. 99, no. 12, 125301, 2019, doi:<a href=\"https://doi.org/10.1103/physrevb.99.125301\">10.1103/physrevb.99.125301</a>.","bibtex":"@article{Hannes_Meier_2019, title={Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model}, volume={99}, DOI={<a href=\"https://doi.org/10.1103/physrevb.99.125301\">10.1103/physrevb.99.125301</a>}, number={12125301}, journal={Physical Review B}, author={Hannes, Wolf-Rüdiger and Meier, Torsten}, year={2019} }","short":"W.-R. Hannes, T. Meier, Physical Review B 99 (2019)."},"intvolume":"        99","year":"2019","date_created":"2019-09-18T14:18:05Z","author":[{"id":"66789","full_name":"Hannes, Wolf-Rüdiger","orcid":"https://orcid.org/0000-0003-1210-4838","last_name":"Hannes","first_name":"Wolf-Rüdiger"},{"first_name":"Torsten","full_name":"Meier, Torsten","id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072"}],"volume":99,"date_updated":"2023-04-21T11:26:19Z","doi":"10.1103/physrevb.99.125301","title":"Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model","type":"journal_article","publication":"Physical Review B","status":"public","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"64","name":"TRR 142 - Subproject A7"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"}],"_id":"13284","language":[{"iso":"eng"}],"article_number":"125301"},{"quality_controlled":"1","year":"2019","date_created":"2019-09-19T14:34:16Z","publisher":"IOP Publishing","title":"Potassium titanyl phosphate (KTP) quasiparticle energies and optical response","publication":"Journal of Physics: Materials","license":"https://creativecommons.org/licenses/by/3.0/","file":[{"title":"Potassium titanyl phosphate (KTP) quasiparticle energies and optical response","description":"Creative Commons Attribution 3.0 Unported Public License (CC BY 3.0)","file_size":1481174,"file_id":"18535","access_level":"open_access","file_name":"Neufeld_2019_J._Phys._Mater._2_045003.pdf","date_updated":"2020-08-30T14:29:27Z","creator":"schindlm","date_created":"2020-08-28T09:07:18Z","relation":"main_file","content_type":"application/pdf"}],"abstract":[{"lang":"eng","text":"The KTiOPO4 (KTP) band structure and dielectric function are calculated on various levels of theory starting from density-functional calculations. Within the independent-particle approximation an electronic transport gap of 2.97 eV is obtained that widens to about 5.23 eV when quasiparticle effects are included using the GW approximation. The optical response is shown to be strongly anisotropic due to (i) the slight asymmetry of the TiO6 octahedra in the (001) plane and (ii) their anisotropic distribution along the [001] and [100] directions. In addition, excitonic effects are very important: The solution of the Bethe–Salpeter equation indicates exciton binding energies of the order of 1.5 eV. Calculations that include both quasiparticle and excitonic effects are in good agreement with the measured reflectivity."}],"external_id":{"isi":["000560410300003"]},"language":[{"iso":"eng"}],"ddc":["530"],"publication_identifier":{"eissn":["2515-7639"]},"has_accepted_license":"1","publication_status":"published","intvolume":"         2","page":"045003","citation":{"ama":"Neufeld S, Bocchini A, Gerstmann U, Schindlmayr A, Schmidt WG. Potassium titanyl phosphate (KTP) quasiparticle energies and optical response. <i>Journal of Physics: Materials</i>. 2019;2:045003. doi:<a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">10.1088/2515-7639/ab29ba</a>","chicago":"Neufeld, Sergej, Adriana Bocchini, Uwe Gerstmann, Arno Schindlmayr, and Wolf Gero Schmidt. “Potassium Titanyl Phosphate (KTP) Quasiparticle Energies and Optical Response.” <i>Journal of Physics: Materials</i> 2 (2019): 045003. <a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">https://doi.org/10.1088/2515-7639/ab29ba</a>.","ieee":"S. Neufeld, A. Bocchini, U. Gerstmann, A. Schindlmayr, and W. G. Schmidt, “Potassium titanyl phosphate (KTP) quasiparticle energies and optical response,” <i>Journal of Physics: Materials</i>, vol. 2, p. 045003, 2019, doi: <a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">10.1088/2515-7639/ab29ba</a>.","apa":"Neufeld, S., Bocchini, A., Gerstmann, U., Schindlmayr, A., &#38; Schmidt, W. G. (2019). Potassium titanyl phosphate (KTP) quasiparticle energies and optical response. <i>Journal of Physics: Materials</i>, <i>2</i>, 045003. <a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">https://doi.org/10.1088/2515-7639/ab29ba</a>","short":"S. Neufeld, A. Bocchini, U. Gerstmann, A. Schindlmayr, W.G. Schmidt, Journal of Physics: Materials 2 (2019) 045003.","bibtex":"@article{Neufeld_Bocchini_Gerstmann_Schindlmayr_Schmidt_2019, title={Potassium titanyl phosphate (KTP) quasiparticle energies and optical response}, volume={2}, DOI={<a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">10.1088/2515-7639/ab29ba</a>}, journal={Journal of Physics: Materials}, publisher={IOP Publishing}, author={Neufeld, Sergej and Bocchini, Adriana and Gerstmann, Uwe and Schindlmayr, Arno and Schmidt, Wolf Gero}, year={2019}, pages={045003} }","mla":"Neufeld, Sergej, et al. “Potassium Titanyl Phosphate (KTP) Quasiparticle Energies and Optical Response.” <i>Journal of Physics: Materials</i>, vol. 2, IOP Publishing, 2019, p. 045003, doi:<a href=\"https://doi.org/10.1088/2515-7639/ab29ba\">10.1088/2515-7639/ab29ba</a>."},"volume":2,"author":[{"last_name":"Neufeld","id":"23261","full_name":"Neufeld, Sergej","first_name":"Sergej"},{"orcid":"https://orcid.org/0000-0002-2134-3075","last_name":"Bocchini","full_name":"Bocchini, Adriana","id":"58349","first_name":"Adriana"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","last_name":"Gerstmann","orcid":"0000-0002-4476-223X"},{"first_name":"Arno","full_name":"Schindlmayr, Arno","id":"458","orcid":"0000-0002-4855-071X","last_name":"Schindlmayr"},{"first_name":"Wolf Gero","full_name":"Schmidt, Wolf Gero","id":"468","last_name":"Schmidt","orcid":"0000-0002-2717-5076"}],"date_updated":"2023-04-21T11:36:12Z","oa":"1","doi":"10.1088/2515-7639/ab29ba","type":"journal_article","status":"public","department":[{"_id":"296"},{"_id":"295"},{"_id":"230"},{"_id":"429"},{"_id":"170"},{"_id":"35"}],"user_id":"171","_id":"13365","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - Project Area B"},{"name":"TRR 142 - Subproject B4","_id":"69"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"file_date_updated":"2020-08-30T14:29:27Z","isi":"1","article_type":"original"},{"page":"155308","intvolume":"       100","citation":{"chicago":"Vondran, J., F. Spitzer, M. Bayer, I. A. Akimov, Alexander Trautmann, Matthias Reichelt, Cedrik Meier, et al. “Spatially Asymmetric Transients of Propagating Exciton-Polariton Modes in a Planar CdZnTe/CdMgTe Guiding Structure.” <i>Physical Review B</i> 100, no. 15 (2019): 155308. <a href=\"https://doi.org/10.1103/physrevb.100.155308\">https://doi.org/10.1103/physrevb.100.155308</a>.","ieee":"J. Vondran <i>et al.</i>, “Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure,” <i>Physical Review B</i>, vol. 100, no. 15, p. 155308, 2019, doi: <a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>.","ama":"Vondran J, Spitzer F, Bayer M, et al. Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure. <i>Physical Review B</i>. 2019;100(15):155308. doi:<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>","bibtex":"@article{Vondran_Spitzer_Bayer_Akimov_Trautmann_Reichelt_Meier_Weber_Meier_André_et al._2019, title={Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure}, volume={100}, DOI={<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>}, number={15}, journal={Physical Review B}, author={Vondran, J. and Spitzer, F. and Bayer, M. and Akimov, I. A. and Trautmann, Alexander and Reichelt, Matthias and Meier, Cedrik and Weber, N. and Meier, Torsten and André, R. and et al.}, year={2019}, pages={155308} }","mla":"Vondran, J., et al. “Spatially Asymmetric Transients of Propagating Exciton-Polariton Modes in a Planar CdZnTe/CdMgTe Guiding Structure.” <i>Physical Review B</i>, vol. 100, no. 15, 2019, p. 155308, doi:<a href=\"https://doi.org/10.1103/physrevb.100.155308\">10.1103/physrevb.100.155308</a>.","short":"J. Vondran, F. Spitzer, M. Bayer, I.A. Akimov, A. Trautmann, M. Reichelt, C. Meier, N. Weber, T. Meier, R. André, H. Mariette, Physical Review B 100 (2019) 155308.","apa":"Vondran, J., Spitzer, F., Bayer, M., Akimov, I. A., Trautmann, A., Reichelt, M., Meier, C., Weber, N., Meier, T., André, R., &#38; Mariette, H. (2019). Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure. <i>Physical Review B</i>, <i>100</i>(15), 155308. <a href=\"https://doi.org/10.1103/physrevb.100.155308\">https://doi.org/10.1103/physrevb.100.155308</a>"},"year":"2019","issue":"15","publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","doi":"10.1103/physrevb.100.155308","title":"Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure","volume":100,"author":[{"first_name":"J.","last_name":"Vondran","full_name":"Vondran, J."},{"full_name":"Spitzer, F.","last_name":"Spitzer","first_name":"F."},{"first_name":"M.","last_name":"Bayer","full_name":"Bayer, M."},{"full_name":"Akimov, I. A.","last_name":"Akimov","first_name":"I. A."},{"first_name":"Alexander","full_name":"Trautmann, Alexander","id":"38163","last_name":"Trautmann"},{"last_name":"Reichelt","id":"138","full_name":"Reichelt, Matthias","first_name":"Matthias"},{"last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","id":"20798","full_name":"Meier, Cedrik","first_name":"Cedrik"},{"full_name":"Weber, N.","last_name":"Weber","first_name":"N."},{"first_name":"Torsten","full_name":"Meier, Torsten","id":"344","orcid":"0000-0001-8864-2072","last_name":"Meier"},{"last_name":"André","full_name":"André, R.","first_name":"R."},{"full_name":"Mariette, H.","last_name":"Mariette","first_name":"H."}],"date_created":"2021-07-29T08:13:23Z","date_updated":"2023-04-21T11:30:46Z","status":"public","publication":"Physical Review B","type":"journal_article","language":[{"iso":"eng"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"429"},{"_id":"230"},{"_id":"35"}],"user_id":"16199","_id":"22887","project":[{"name":"TRR 142","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 - Project Area B","_id":"55"},{"_id":"59","name":"TRR 142 - Subproject A2"},{"_id":"67","name":"TRR 142 - Subproject B2"},{"name":"TRR 142 - Subproject B3","_id":"68"},{"_id":"62","name":"TRR 142 - Subproject A5"},{"_id":"71","name":"TRR 142 - Subproject C1"}]},{"type":"preprint","publication":"arXiv:1912.09097","abstract":[{"text":"Measurement-induced nonclassical effects in a two-mode interferometer are\r\ninvestigated theoretically using numerical simulations and analytical results.\r\nWe demonstrate that for certain parameters measurements within the\r\ninterferometer lead to the occurrence of two-mode squeezing. The results\r\nstrongly depend on the detection probability, the phase inside the\r\ninterferometer, and the choice of the input states. The appropriate parameters\r\nfor maximized squeezing are obtained. We analyze the influence of losses and\r\nconfirm that the predicted effects are within reach of current experimental\r\ntechniques.","lang":"eng"}],"status":"public","project":[{"_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"72","name":"TRR 142 - Subproject C2"},{"name":"TRR 142 - Subproject C6","_id":"76"}],"_id":"22884","user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"482"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"language":[{"iso":"eng"}],"year":"2019","citation":{"bibtex":"@article{Riabinin_Sharapova_Bartley_Meier_2019, title={Generating two-mode squeezing with multimode measurement-induced nonlinearity}, journal={arXiv:1912.09097}, author={Riabinin, Matvei and Sharapova, Polina and Bartley, Tim and Meier, Torsten}, year={2019} }","short":"M. Riabinin, P. Sharapova, T. Bartley, T. Meier, ArXiv:1912.09097 (2019).","mla":"Riabinin, Matvei, et al. “Generating Two-Mode Squeezing with Multimode Measurement-Induced Nonlinearity.” <i>ArXiv:1912.09097</i>, 2019.","apa":"Riabinin, M., Sharapova, P., Bartley, T., &#38; Meier, T. (2019). Generating two-mode squeezing with multimode measurement-induced nonlinearity. In <i>arXiv:1912.09097</i>.","chicago":"Riabinin, Matvei, Polina Sharapova, Tim Bartley, and Torsten Meier. “Generating Two-Mode Squeezing with Multimode Measurement-Induced Nonlinearity.” <i>ArXiv:1912.09097</i>, 2019.","ieee":"M. Riabinin, P. Sharapova, T. Bartley, and T. Meier, “Generating two-mode squeezing with multimode measurement-induced nonlinearity,” <i>arXiv:1912.09097</i>. 2019.","ama":"Riabinin M, Sharapova P, Bartley T, Meier T. Generating two-mode squeezing with multimode measurement-induced nonlinearity. <i>arXiv:191209097</i>. Published online 2019."},"oa":"1","date_updated":"2023-04-21T11:28:10Z","author":[{"first_name":"Matvei","full_name":"Riabinin, Matvei","last_name":"Riabinin"},{"last_name":"Sharapova","full_name":"Sharapova, Polina","id":"60286","first_name":"Polina"},{"first_name":"Tim","id":"49683","full_name":"Bartley, Tim","last_name":"Bartley"},{"first_name":"Torsten","id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"}],"date_created":"2021-07-29T08:09:22Z","title":"Generating two-mode squeezing with multimode measurement-induced nonlinearity","main_file_link":[{"url":"https://doi.org/10.1088/2399-6528/abeec2","open_access":"1"}]},{"year":"2019","intvolume":"        27","page":"2225-2234","citation":{"mla":"Song, Xiaohong, et al. “Attosecond Temporal Confinement of Interband Excitation by Intraband Motion.” <i>Optics Express</i>, vol. 27, no. 3, 2019, pp. 2225–34, doi:<a href=\"https://doi.org/10.1364/oe.27.002225\">10.1364/oe.27.002225</a>.","bibtex":"@article{Song_Zuo_Yang_Li_Meier_Yang_2019, title={Attosecond temporal confinement of interband excitation by intraband motion}, volume={27}, DOI={<a href=\"https://doi.org/10.1364/oe.27.002225\">10.1364/oe.27.002225</a>}, number={3}, journal={Optics Express}, author={Song, Xiaohong and Zuo, Ruixin and Yang, Shidong and Li, Pengcheng and Meier, Torsten and Yang, Weifeng}, year={2019}, pages={2225–2234} }","short":"X. Song, R. Zuo, S. Yang, P. Li, T. Meier, W. Yang, Optics Express 27 (2019) 2225–2234.","apa":"Song, X., Zuo, R., Yang, S., Li, P., Meier, T., &#38; Yang, W. (2019). Attosecond temporal confinement of interband excitation by intraband motion. <i>Optics Express</i>, <i>27</i>(3), 2225–2234. <a href=\"https://doi.org/10.1364/oe.27.002225\">https://doi.org/10.1364/oe.27.002225</a>","ama":"Song X, Zuo R, Yang S, Li P, Meier T, Yang W. Attosecond temporal confinement of interband excitation by intraband motion. <i>Optics Express</i>. 2019;27(3):2225-2234. doi:<a href=\"https://doi.org/10.1364/oe.27.002225\">10.1364/oe.27.002225</a>","ieee":"X. Song, R. Zuo, S. Yang, P. Li, T. Meier, and W. Yang, “Attosecond temporal confinement of interband excitation by intraband motion,” <i>Optics Express</i>, vol. 27, no. 3, pp. 2225–2234, 2019, doi: <a href=\"https://doi.org/10.1364/oe.27.002225\">10.1364/oe.27.002225</a>.","chicago":"Song, Xiaohong, Ruixin Zuo, Shidong Yang, Pengcheng Li, Torsten Meier, and Weifeng Yang. “Attosecond Temporal Confinement of Interband Excitation by Intraband Motion.” <i>Optics Express</i> 27, no. 3 (2019): 2225–34. <a href=\"https://doi.org/10.1364/oe.27.002225\">https://doi.org/10.1364/oe.27.002225</a>."},"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","issue":"3","title":"Attosecond temporal confinement of interband excitation by intraband motion","doi":"10.1364/oe.27.002225","date_updated":"2023-04-21T11:27:40Z","volume":27,"date_created":"2019-10-18T07:35:35Z","author":[{"last_name":"Song","full_name":"Song, Xiaohong","first_name":"Xiaohong"},{"first_name":"Ruixin","full_name":"Zuo, Ruixin","last_name":"Zuo"},{"last_name":"Yang","full_name":"Yang, Shidong","first_name":"Shidong"},{"full_name":"Li, Pengcheng","last_name":"Li","first_name":"Pengcheng"},{"last_name":"Meier","orcid":"0000-0001-8864-2072","id":"344","full_name":"Meier, Torsten","first_name":"Torsten"},{"first_name":"Weifeng","last_name":"Yang","full_name":"Yang, Weifeng"}],"status":"public","publication":"Optics Express","type":"journal_article","language":[{"iso":"eng"}],"_id":"13900","project":[{"_id":"53","name":"TRR 142"},{"_id":"54","name":"TRR 142 - Project Area A"},{"_id":"64","name":"TRR 142 - Subproject A7"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"429"}],"user_id":"16199"},{"date_created":"2019-09-20T12:22:27Z","author":[{"first_name":"Adriana","full_name":"Bocchini, Adriana","id":"58349","last_name":"Bocchini","orcid":"https://orcid.org/0000-0002-2134-3075"},{"full_name":"Neufeld, Sergej","id":"23261","last_name":"Neufeld","first_name":"Sergej"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Wolf Gero","id":"468","full_name":"Schmidt, Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt"}],"volume":31,"date_updated":"2023-04-21T11:37:48Z","oa":"1","main_file_link":[{"open_access":"1"}],"doi":"10.1088/1361-648x/ab295c","title":"Oxygen and potassium vacancies in KTP calculated from first principles","publication_status":"published","publication_identifier":{"issn":["0953-8984","1361-648X"]},"citation":{"ama":"Bocchini A, Neufeld S, Gerstmann U, Schmidt WG. Oxygen and potassium vacancies in KTP calculated from first principles. <i>Journal of Physics: Condensed Matter</i>. 2019;31:385401. doi:<a href=\"https://doi.org/10.1088/1361-648x/ab295c\">10.1088/1361-648x/ab295c</a>","chicago":"Bocchini, Adriana, Sergej Neufeld, Uwe Gerstmann, and Wolf Gero Schmidt. “Oxygen and Potassium Vacancies in KTP Calculated from First Principles.” <i>Journal of Physics: Condensed Matter</i> 31 (2019): 385401. <a href=\"https://doi.org/10.1088/1361-648x/ab295c\">https://doi.org/10.1088/1361-648x/ab295c</a>.","ieee":"A. Bocchini, S. Neufeld, U. Gerstmann, and W. G. Schmidt, “Oxygen and potassium vacancies in KTP calculated from first principles,” <i>Journal of Physics: Condensed Matter</i>, vol. 31, p. 385401, 2019, doi: <a href=\"https://doi.org/10.1088/1361-648x/ab295c\">10.1088/1361-648x/ab295c</a>.","apa":"Bocchini, A., Neufeld, S., Gerstmann, U., &#38; Schmidt, W. G. (2019). Oxygen and potassium vacancies in KTP calculated from first principles. <i>Journal of Physics: Condensed Matter</i>, <i>31</i>, 385401. <a href=\"https://doi.org/10.1088/1361-648x/ab295c\">https://doi.org/10.1088/1361-648x/ab295c</a>","short":"A. Bocchini, S. Neufeld, U. Gerstmann, W.G. Schmidt, Journal of Physics: Condensed Matter 31 (2019) 385401.","mla":"Bocchini, Adriana, et al. “Oxygen and Potassium Vacancies in KTP Calculated from First Principles.” <i>Journal of Physics: Condensed Matter</i>, vol. 31, 2019, p. 385401, doi:<a href=\"https://doi.org/10.1088/1361-648x/ab295c\">10.1088/1361-648x/ab295c</a>.","bibtex":"@article{Bocchini_Neufeld_Gerstmann_Schmidt_2019, title={Oxygen and potassium vacancies in KTP calculated from first principles}, volume={31}, DOI={<a href=\"https://doi.org/10.1088/1361-648x/ab295c\">10.1088/1361-648x/ab295c</a>}, journal={Journal of Physics: Condensed Matter}, author={Bocchini, Adriana and Neufeld, Sergej and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2019}, pages={385401} }"},"page":"385401","intvolume":"        31","year":"2019","user_id":"171","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"TRR 142 - B4: TRR 142 - Subproject B4","_id":"69"}],"_id":"13429","language":[{"iso":"eng"}],"type":"journal_article","publication":"Journal of Physics: Condensed Matter","status":"public"},{"title":"Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces","doi":"10.1002/adom.201900782","date_updated":"2025-01-08T11:32:38Z","volume":7,"date_created":"2019-09-18T11:41:44Z","author":[{"last_name":"Lin","full_name":"Lin, Zemeng","first_name":"Zemeng"},{"full_name":"Huang, Lingling","last_name":"Huang","first_name":"Lingling"},{"last_name":"Xu","full_name":"Xu, Zhen Tao","first_name":"Zhen Tao"},{"first_name":"Xiaowei","full_name":"Li, Xiaowei","last_name":"Li"},{"full_name":"Zentgraf, Thomas","id":"30525","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas"},{"last_name":"Wang","full_name":"Wang, Yongtian","first_name":"Yongtian"}],"year":"2019","page":"1900782","intvolume":"         7","citation":{"mla":"Lin, Zemeng, et al. “Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces.” <i>Advanced Optical Materials</i>, vol. 7, no. 21, 2019, p. 1900782, doi:<a href=\"https://doi.org/10.1002/adom.201900782\">10.1002/adom.201900782</a>.","short":"Z. Lin, L. Huang, Z.T. Xu, X. Li, T. Zentgraf, Y. Wang, Advanced Optical Materials 7 (2019) 1900782.","bibtex":"@article{Lin_Huang_Xu_Li_Zentgraf_Wang_2019, title={Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/adom.201900782\">10.1002/adom.201900782</a>}, number={21}, journal={Advanced Optical Materials}, author={Lin, Zemeng and Huang, Lingling and Xu, Zhen Tao and Li, Xiaowei and Zentgraf, Thomas and Wang, Yongtian}, year={2019}, pages={1900782} }","apa":"Lin, Z., Huang, L., Xu, Z. T., Li, X., Zentgraf, T., &#38; Wang, Y. (2019). Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces. <i>Advanced Optical Materials</i>, <i>7</i>(21), 1900782. <a href=\"https://doi.org/10.1002/adom.201900782\">https://doi.org/10.1002/adom.201900782</a>","chicago":"Lin, Zemeng, Lingling Huang, Zhen Tao Xu, Xiaowei Li, Thomas Zentgraf, and Yongtian Wang. “Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces.” <i>Advanced Optical Materials</i> 7, no. 21 (2019): 1900782. <a href=\"https://doi.org/10.1002/adom.201900782\">https://doi.org/10.1002/adom.201900782</a>.","ieee":"Z. Lin, L. Huang, Z. T. Xu, X. Li, T. Zentgraf, and Y. Wang, “Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces,” <i>Advanced Optical Materials</i>, vol. 7, no. 21, p. 1900782, 2019, doi: <a href=\"https://doi.org/10.1002/adom.201900782\">10.1002/adom.201900782</a>.","ama":"Lin Z, Huang L, Xu ZT, Li X, Zentgraf T, Wang Y. Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces. <i>Advanced Optical Materials</i>. 2019;7(21):1900782. doi:<a href=\"https://doi.org/10.1002/adom.201900782\">10.1002/adom.201900782</a>"},"publication_identifier":{"issn":["2195-1071","2195-1071"]},"publication_status":"published","issue":"21","language":[{"iso":"eng"}],"_id":"13282","project":[{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"75","name":"TRR 142 - Subproject C5","grant_number":"231447078"},{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"}],"department":[{"_id":"15"},{"_id":"230"},{"_id":"289"}],"user_id":"30525","status":"public","publication":"Advanced Optical Materials","type":"journal_article"},{"date_created":"2020-12-02T08:58:21Z","title":"Bloch oscillations of multidimensional dark soliton wave packets and light bullets","issue":"6","year":"2019","external_id":{"pmid":["30874642"]},"language":[{"iso":"eng"}],"publication":"Optics Letters","date_updated":"2025-12-05T13:45:12Z","author":[{"first_name":"R","full_name":"Driben, R","last_name":"Driben"},{"first_name":"Xuekai","full_name":"Ma, Xuekai","id":"59416","last_name":"Ma"},{"first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan","id":"27271"},{"last_name":"Meier","orcid":"0000-0001-8864-2072","id":"344","full_name":"Meier, Torsten","first_name":"Torsten"}],"volume":44,"doi":"10.1364/ol.44.001327","publication_status":"published","publication_identifier":{"issn":["0146-9592","1539-4794"]},"pmid":"1","citation":{"ama":"Driben R, Ma X, Schumacher S, Meier T. Bloch oscillations of multidimensional dark soliton wave packets and light bullets. <i>Optics Letters</i>. 2019;44(6):1327-1330. doi:<a href=\"https://doi.org/10.1364/ol.44.001327\">10.1364/ol.44.001327</a>","ieee":"R. Driben, X. Ma, S. Schumacher, and T. Meier, “Bloch oscillations of multidimensional dark soliton wave packets and light bullets,” <i>Optics Letters</i>, vol. 44, no. 6, pp. 1327–1330, 2019, doi: <a href=\"https://doi.org/10.1364/ol.44.001327\">10.1364/ol.44.001327</a>.","chicago":"Driben, R, Xuekai Ma, Stefan Schumacher, and Torsten Meier. “Bloch Oscillations of Multidimensional Dark Soliton Wave Packets and Light Bullets.” <i>Optics Letters</i> 44, no. 6 (2019): 1327–30. <a href=\"https://doi.org/10.1364/ol.44.001327\">https://doi.org/10.1364/ol.44.001327</a>.","short":"R. Driben, X. Ma, S. Schumacher, T. Meier, Optics Letters 44 (2019) 1327–1330.","bibtex":"@article{Driben_Ma_Schumacher_Meier_2019, title={Bloch oscillations of multidimensional dark soliton wave packets and light bullets}, volume={44}, DOI={<a href=\"https://doi.org/10.1364/ol.44.001327\">10.1364/ol.44.001327</a>}, number={6}, journal={Optics Letters}, author={Driben, R and Ma, Xuekai and Schumacher, Stefan and Meier, Torsten}, year={2019}, pages={1327–1330} }","mla":"Driben, R., et al. “Bloch Oscillations of Multidimensional Dark Soliton Wave Packets and Light Bullets.” <i>Optics Letters</i>, vol. 44, no. 6, 2019, pp. 1327–30, doi:<a href=\"https://doi.org/10.1364/ol.44.001327\">10.1364/ol.44.001327</a>.","apa":"Driben, R., Ma, X., Schumacher, S., &#38; Meier, T. (2019). Bloch oscillations of multidimensional dark soliton wave packets and light bullets. <i>Optics Letters</i>, <i>44</i>(6), 1327–1330. <a href=\"https://doi.org/10.1364/ol.44.001327\">https://doi.org/10.1364/ol.44.001327</a>"},"page":"1327-1330","intvolume":"        44","project":[{"name":"TRR 142","_id":"53"},{"_id":"54","name":"TRR 142 - Project Area A"},{"name":"TRR 142 - Subproject A4","_id":"61"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"}],"_id":"20578","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"230"},{"_id":"429"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"293"}],"article_type":"original","type":"journal_article","status":"public"},{"title":"Temporally multimode four-photon Hong-Ou-Mandel interference","doi":"10.1103/physreva.100.053829","publisher":"American Physical Society (APS)","date_updated":"2025-12-16T11:28:33Z","date_created":"2023-01-26T14:12:28Z","author":[{"first_name":"Alessandro","id":"65609","full_name":"Ferreri, Alessandro","last_name":"Ferreri"},{"first_name":"V.","last_name":"Ansari","full_name":"Ansari, V."},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"},{"full_name":"Sharapova, Polina R.","id":"60286","last_name":"Sharapova","first_name":"Polina R."}],"volume":100,"year":"2019","citation":{"ama":"Ferreri A, Ansari V, Silberhorn C, Sharapova PR. Temporally multimode four-photon Hong-Ou-Mandel interference. <i>Physical Review A</i>. 2019;100(5). doi:<a href=\"https://doi.org/10.1103/physreva.100.053829\">10.1103/physreva.100.053829</a>","chicago":"Ferreri, Alessandro, V. Ansari, Christine Silberhorn, and Polina R. Sharapova. “Temporally Multimode Four-Photon Hong-Ou-Mandel Interference.” <i>Physical Review A</i> 100, no. 5 (2019). <a href=\"https://doi.org/10.1103/physreva.100.053829\">https://doi.org/10.1103/physreva.100.053829</a>.","ieee":"A. Ferreri, V. Ansari, C. Silberhorn, and P. R. Sharapova, “Temporally multimode four-photon Hong-Ou-Mandel interference,” <i>Physical Review A</i>, vol. 100, no. 5, Art. no. 053829, 2019, doi: <a href=\"https://doi.org/10.1103/physreva.100.053829\">10.1103/physreva.100.053829</a>.","short":"A. Ferreri, V. Ansari, C. Silberhorn, P.R. Sharapova, Physical Review A 100 (2019).","bibtex":"@article{Ferreri_Ansari_Silberhorn_Sharapova_2019, title={Temporally multimode four-photon Hong-Ou-Mandel interference}, volume={100}, DOI={<a href=\"https://doi.org/10.1103/physreva.100.053829\">10.1103/physreva.100.053829</a>}, number={5053829}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Ferreri, Alessandro and Ansari, V. and Silberhorn, Christine and Sharapova, Polina R.}, year={2019} }","mla":"Ferreri, Alessandro, et al. “Temporally Multimode Four-Photon Hong-Ou-Mandel Interference.” <i>Physical Review A</i>, vol. 100, no. 5, 053829, American Physical Society (APS), 2019, doi:<a href=\"https://doi.org/10.1103/physreva.100.053829\">10.1103/physreva.100.053829</a>.","apa":"Ferreri, A., Ansari, V., Silberhorn, C., &#38; Sharapova, P. R. (2019). Temporally multimode four-photon Hong-Ou-Mandel interference. <i>Physical Review A</i>, <i>100</i>(5), Article 053829. <a href=\"https://doi.org/10.1103/physreva.100.053829\">https://doi.org/10.1103/physreva.100.053829</a>"},"intvolume":"       100","publication_status":"published","publication_identifier":{"issn":["2469-9926","2469-9934"]},"issue":"5","article_number":"053829","language":[{"iso":"eng"}],"project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"_id":"72","name":"TRR 142 - C2: TRR 142 - Subproject C2"}],"_id":"40384","user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"status":"public","type":"journal_article","publication":"Physical Review A"},{"publication":"Optics Express","file":[{"relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_name":"2018-07 Ebers_Hammer_Förstner_OpticsExpress_Oblique incidence of semi guided planar waves on slab waveguide steps_Rounded Edges.pdf","file_id":"3741","file_size":6193865,"creator":"hclaudia","date_created":"2018-08-01T09:30:58Z","date_updated":"2018-08-01T09:30:58Z"}],"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."}],"language":[{"iso":"eng"}],"ddc":["620"],"keyword":["tet_topic_waveguide"],"issue":"14","year":"2018","date_created":"2018-08-01T09:31:03Z","publisher":"OSA Publishing","title":"Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges","type":"journal_article","status":"public","urn":"37409","user_id":"158","department":[{"_id":"61"}],"project":[{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142","_id":"53"},{"_id":"75","name":"TRR 142 - Subproject C5"}],"_id":"3740","file_date_updated":"2018-08-01T09:30:58Z","article_type":"letter_note","publication_status":"published","has_accepted_license":"1","citation":{"bibtex":"@article{Ebers_Hammer_Förstner_2018, title={Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges}, volume={26}, DOI={<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>}, number={14}, journal={Optics Express}, publisher={OSA Publishing}, author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2018}, pages={18621–18632} }","mla":"Ebers, Lena, et al. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” <i>Optics Express</i>, vol. 26, no. 14, OSA Publishing, 2018, pp. 18621–32, doi:<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>.","short":"L. Ebers, M. Hammer, J. Förstner, Optics Express 26 (2018) 18621–18632.","apa":"Ebers, L., Hammer, M., &#38; Förstner, J. (2018). Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. <i>Optics Express</i>, <i>26</i>(14), 18621–18632. <a href=\"https://doi.org/10.1364/OE.26.018621\">https://doi.org/10.1364/OE.26.018621</a>","ieee":"L. Ebers, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges,” <i>Optics Express</i>, vol. 26, no. 14, pp. 18621–18632, 2018.","chicago":"Ebers, Lena, Manfred Hammer, and Jens Förstner. “Oblique Incidence of Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” <i>Optics Express</i> 26, no. 14 (2018): 18621–32. <a href=\"https://doi.org/10.1364/OE.26.018621\">https://doi.org/10.1364/OE.26.018621</a>.","ama":"Ebers L, Hammer M, Förstner J. Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges. <i>Optics Express</i>. 2018;26(14):18621-18632. doi:<a href=\"https://doi.org/10.1364/OE.26.018621\">10.1364/OE.26.018621</a>"},"intvolume":"        26","page":"18621-18632","author":[{"first_name":"Lena","id":"40428","full_name":"Ebers, Lena","last_name":"Ebers"},{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"volume":26,"date_updated":"2022-01-06T06:59:33Z","oa":"1","doi":"10.1364/OE.26.018621"},{"file_date_updated":"2018-10-02T17:13:55Z","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"4579","project":[{"name":"TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 - Subproject C5","_id":"75"}],"status":"public","type":"conference","doi":"10.1109/mmet.2018.8460455","author":[{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"last_name":"Ebers","full_name":"Ebers, Lena","id":"40428","first_name":"Lena"},{"first_name":"Andre","last_name":"Hildebrandt","full_name":"Hildebrandt, Andre"},{"first_name":"Samer","full_name":"Alhaddad, Samer","id":"42456","last_name":"Alhaddad"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"date_updated":"2022-01-06T07:01:13Z","citation":{"apa":"Hammer, M., Ebers, L., Hildebrandt, A., Alhaddad, S., &#38; Förstner, J. (2018). Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE. <a href=\"https://doi.org/10.1109/mmet.2018.8460455\">https://doi.org/10.1109/mmet.2018.8460455</a>","mla":"Hammer, Manfred, et al. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>, IEEE, 2018, doi:<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>.","short":"M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, J. Förstner, in: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), IEEE, 2018.","bibtex":"@inproceedings{Hammer_Ebers_Hildebrandt_Alhaddad_Förstner_2018, title={Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity}, DOI={<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>}, booktitle={2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)}, publisher={IEEE}, author={Hammer, Manfred and Ebers, Lena and Hildebrandt, Andre and Alhaddad, Samer and Förstner, Jens}, year={2018} }","ieee":"M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, and J. Förstner, “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity,” in <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>, 2018.","chicago":"Hammer, Manfred, Lena Ebers, Andre Hildebrandt, Samer Alhaddad, and Jens Förstner. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” In <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE, 2018. <a href=\"https://doi.org/10.1109/mmet.2018.8460455\">https://doi.org/10.1109/mmet.2018.8460455</a>.","ama":"Hammer M, Ebers L, Hildebrandt A, Alhaddad S, Förstner J. Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In: <i>2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)</i>. IEEE; 2018. doi:<a href=\"https://doi.org/10.1109/mmet.2018.8460455\">10.1109/mmet.2018.8460455</a>"},"has_accepted_license":"1","publication_identifier":{"isbn":["9781538654385"]},"publication_status":"published","keyword":["tet_topic_waveguides"],"ddc":["530"],"file":[{"file_name":"2018-09 Hammer - MMET (final draft).pdf","access_level":"closed","file_id":"4580","file_size":242956,"date_created":"2018-10-02T17:13:55Z","creator":"fossie","date_updated":"2018-10-02T17:13:55Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"abstract":[{"lang":"eng","text":"Semi-guided waves confined in dielectric slab waveguides are being considered for oblique angles of propagation. If the waves encounter a linear discontinuity of (mostly) arbitrary shape and extension, a variant of Snell's law applies, separately for each pair of incoming and outgoing modes. Depending on the effective indices involved, and on the angle of incidence, power transfer to specific outgoing waves can be allowed or forbidden. In particular, critical angles of incidence can be identified, beyond which any power transfer to non-guided waves is forbidden, i.e. all radiative losses are suppressed. In that case the input power is carried away from the discontinuity exclusively by reflected semi-guided waves in the input slab, or by semi-guided waves that are transmitted into other outgoing slab waveguides. Vectorial equations on a 2-D cross sectional domain apply. These are formally identical to the equations that govern the eigenmodes of 3-D channel waveguides. Here, however, these need to be solved not as an eigenvalue problem, but as an inhomogeneous problem with a right-hand-side that is given by the incoming semi-guided wave, and subject to transparent boundary conditions. The equations resemble a standard 2-D Helmholtz problem, with an effective permittivity in place of the actual relative permittivity. Depending on the properties of the incoming wave, including the angle of incidence, this effective permittivity can become locally negative, causing the suppression of propagating outgoing waves. A series of high-contrast example configurations are discussed, where these effects lead to - in some respects - quite surprising transmission characteristics."}],"publication":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","title":"Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity","date_created":"2018-10-02T17:11:59Z","publisher":"IEEE","year":"2018"}]