[{"doi":"10.1088/2515-7647/ac5a5b","language":[{"iso":"eng"}],"intvolume":"         4","publication_status":"published","date_updated":"2025-12-16T11:31:04Z","publication_identifier":{"issn":["2515-7647"]},"author":[{"first_name":"Lena","last_name":"Ebers","full_name":"Ebers, Lena","id":"40428"},{"id":"65609","last_name":"Ferreri","first_name":"Alessandro","full_name":"Ferreri, Alessandro"},{"id":"48077","full_name":"Hammer, Manfred","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"full_name":"Albert, Maximilian","last_name":"Albert","first_name":"Maximilian"},{"first_name":"Cedrik","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik","id":"20798"},{"id":"158","first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens"},{"full_name":"Sharapova, Polina R.","first_name":"Polina R.","last_name":"Sharapova","id":"60286"}],"year":"2022","title":"Flexible source of correlated photons based on LNOI rib waveguides","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"287"},{"_id":"35"},{"_id":"34"}],"keyword":["tet_topic_waveguide"],"type":"journal_article","date_created":"2022-03-07T09:51:50Z","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."}],"related_material":{"link":[{"description":"Corrigendum for table C1","relation":"erratum","url":"https://doi.org/10.1088/2515-7647/acc70c"}]},"publication":"Journal of Physics: Photonics","volume":4,"user_id":"16199","publisher":"IOP Publishing","_id":"30210","page":"025001","status":"public","project":[{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"_id":"75","name":"TRR 142 - C5: TRR 142 - Subproject C5"},{"_id":"72","name":"TRR 142 - C2: TRR 142 - Subproject C2"},{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"}],"citation":{"chicago":"Ebers, Lena, Alessandro Ferreri, Manfred Hammer, Maximilian Albert, Cedrik Meier, Jens Förstner, and Polina R. Sharapova. “Flexible Source of Correlated Photons Based on LNOI Rib Waveguides.” <i>Journal of Physics: Photonics</i> 4 (2022): 025001. <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">https://doi.org/10.1088/2515-7647/ac5a5b</a>.","short":"L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 025001.","apa":"Ebers, L., Ferreri, A., Hammer, M., Albert, M., Meier, C., Förstner, J., &#38; Sharapova, P. R. (2022). Flexible source of correlated photons based on LNOI rib waveguides. <i>Journal of Physics: Photonics</i>, <i>4</i>, 025001. <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">https://doi.org/10.1088/2515-7647/ac5a5b</a>","ieee":"L. Ebers <i>et al.</i>, “Flexible source of correlated photons based on LNOI rib waveguides,” <i>Journal of Physics: Photonics</i>, vol. 4, p. 025001, 2022, doi: <a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>.","ama":"Ebers L, Ferreri A, Hammer M, et al. Flexible source of correlated photons based on LNOI rib waveguides. <i>Journal of Physics: Photonics</i>. 2022;4:025001. doi:<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>","bibtex":"@article{Ebers_Ferreri_Hammer_Albert_Meier_Förstner_Sharapova_2022, title={Flexible source of correlated photons based on LNOI rib waveguides}, volume={4}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Ebers, Lena and Ferreri, Alessandro and Hammer, Manfred and Albert, Maximilian and Meier, Cedrik and Förstner, Jens and Sharapova, Polina R.}, year={2022}, pages={025001} }","mla":"Ebers, Lena, et al. “Flexible Source of Correlated Photons Based on LNOI Rib Waveguides.” <i>Journal of Physics: Photonics</i>, vol. 4, IOP Publishing, 2022, p. 025001, doi:<a href=\"https://doi.org/10.1088/2515-7647/ac5a5b\">10.1088/2515-7647/ac5a5b</a>."}},{"department":[{"_id":"15"},{"_id":"170"},{"_id":"569"},{"_id":"706"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"type":"journal_article","date_created":"2021-10-26T12:42:16Z","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"72","name":"TRR 142 - C2: TRR 142 - Subproject C2"}],"citation":{"mla":"Luo, Kai Hong, et al. “Quantum Optical Coherence: From Linear to Nonlinear Interferometers.” <i>Physical Review A</i>, 2021, doi:<a href=\"https://doi.org/10.1103/physreva.104.043707\">10.1103/physreva.104.043707</a>.","ama":"Luo KH, Santandrea M, Stefszky M, et al. Quantum optical coherence: From linear to nonlinear interferometers. <i>Physical Review A</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1103/physreva.104.043707\">10.1103/physreva.104.043707</a>","bibtex":"@article{Luo_Santandrea_Stefszky_Sperling_Massaro_Ferreri_Sharapova_Herrmann_Silberhorn_2021, title={Quantum optical coherence: From linear to nonlinear interferometers}, DOI={<a href=\"https://doi.org/10.1103/physreva.104.043707\">10.1103/physreva.104.043707</a>}, journal={Physical Review A}, author={Luo, Kai Hong and Santandrea, Matteo and Stefszky, Michael and Sperling, Jan and Massaro, Marcello and Ferreri, Alessandro and Sharapova, Polina and Herrmann, Harald and Silberhorn, Christine}, year={2021} }","apa":"Luo, K. H., Santandrea, M., Stefszky, M., Sperling, J., Massaro, M., Ferreri, A., Sharapova, P., Herrmann, H., &#38; Silberhorn, C. (2021). Quantum optical coherence: From linear to nonlinear interferometers. <i>Physical Review A</i>. <a href=\"https://doi.org/10.1103/physreva.104.043707\">https://doi.org/10.1103/physreva.104.043707</a>","ieee":"K. H. Luo <i>et al.</i>, “Quantum optical coherence: From linear to nonlinear interferometers,” <i>Physical Review A</i>, 2021, doi: <a href=\"https://doi.org/10.1103/physreva.104.043707\">10.1103/physreva.104.043707</a>.","short":"K.H. Luo, M. Santandrea, M. Stefszky, J. Sperling, M. Massaro, A. Ferreri, P. Sharapova, H. Herrmann, C. Silberhorn, Physical Review A (2021).","chicago":"Luo, Kai Hong, Matteo Santandrea, Michael Stefszky, Jan Sperling, Marcello Massaro, Alessandro Ferreri, Polina Sharapova, Harald Herrmann, and Christine Silberhorn. “Quantum Optical Coherence: From Linear to Nonlinear Interferometers.” <i>Physical Review A</i>, 2021. <a href=\"https://doi.org/10.1103/physreva.104.043707\">https://doi.org/10.1103/physreva.104.043707</a>."},"publication":"Physical Review A","doi":"10.1103/physreva.104.043707","user_id":"16199","language":[{"iso":"eng"}],"_id":"26889","date_updated":"2023-04-20T15:08:25Z","publication_status":"published","author":[{"full_name":"Luo, Kai Hong","orcid":"0000-0003-1008-4976","last_name":"Luo","first_name":"Kai Hong","id":"36389"},{"id":"55095","full_name":"Santandrea, Matteo","orcid":"0000-0001-5718-358X","last_name":"Santandrea","first_name":"Matteo"},{"id":"42777","full_name":"Stefszky, Michael","first_name":"Michael","last_name":"Stefszky"},{"id":"75127","full_name":"Sperling, Jan","last_name":"Sperling","orcid":"0000-0002-5844-3205","first_name":"Jan"},{"last_name":"Massaro","first_name":"Marcello","orcid":"0000-0002-2539-7652","full_name":"Massaro, Marcello","id":"59545"},{"id":"65609","full_name":"Ferreri, Alessandro","last_name":"Ferreri","first_name":"Alessandro"},{"first_name":"Polina","last_name":"Sharapova","full_name":"Sharapova, Polina","id":"60286"},{"id":"216","first_name":"Harald","last_name":"Herrmann","full_name":"Herrmann, Harald"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"status":"public","title":"Quantum optical coherence: From linear to nonlinear interferometers","year":"2021"},{"date_created":"2021-10-12T08:46:46Z","type":"journal_article","department":[{"_id":"15"},{"_id":"288"}],"publication":"Quantum","citation":{"apa":"Ferreri, A., Santandrea, M., Stefszky, M., Luo, K. H., Herrmann, H., Silberhorn, C., &#38; Sharapova, P. R. (2021). Spectrally multimode integrated SU(1,1) interferometer. <i>Quantum</i>, Article 461. <a href=\"https://doi.org/10.22331/q-2021-05-27-461\">https://doi.org/10.22331/q-2021-05-27-461</a>","ieee":"A. Ferreri <i>et al.</i>, “Spectrally multimode integrated SU(1,1) interferometer,” <i>Quantum</i>, Art. no. 461, 2021, doi: <a href=\"https://doi.org/10.22331/q-2021-05-27-461\">10.22331/q-2021-05-27-461</a>.","chicago":"Ferreri, Alessandro, Matteo Santandrea, Michael Stefszky, Kai Hong Luo, Harald Herrmann, Christine Silberhorn, and Polina R. Sharapova. “Spectrally Multimode Integrated SU(1,1) Interferometer.” <i>Quantum</i>, 2021. <a href=\"https://doi.org/10.22331/q-2021-05-27-461\">https://doi.org/10.22331/q-2021-05-27-461</a>.","short":"A. Ferreri, M. Santandrea, M. Stefszky, K.H. Luo, H. Herrmann, C. Silberhorn, P.R. Sharapova, Quantum (2021).","mla":"Ferreri, Alessandro, et al. “Spectrally Multimode Integrated SU(1,1) Interferometer.” <i>Quantum</i>, 461, 2021, doi:<a href=\"https://doi.org/10.22331/q-2021-05-27-461\">10.22331/q-2021-05-27-461</a>.","ama":"Ferreri A, Santandrea M, Stefszky M, et al. Spectrally multimode integrated SU(1,1) interferometer. <i>Quantum</i>. Published online 2021. doi:<a href=\"https://doi.org/10.22331/q-2021-05-27-461\">10.22331/q-2021-05-27-461</a>","bibtex":"@article{Ferreri_Santandrea_Stefszky_Luo_Herrmann_Silberhorn_Sharapova_2021, title={Spectrally multimode integrated SU(1,1) interferometer}, DOI={<a href=\"https://doi.org/10.22331/q-2021-05-27-461\">10.22331/q-2021-05-27-461</a>}, number={461}, journal={Quantum}, author={Ferreri, Alessandro and Santandrea, Matteo and Stefszky, Michael and Luo, Kai Hong and Herrmann, Harald and Silberhorn, Christine and Sharapova, Polina R.}, year={2021} }"},"abstract":[{"lang":"eng","text":"<jats:p>Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.</jats:p>"}],"project":[{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"}],"article_number":"461","_id":"26077","language":[{"iso":"eng"}],"user_id":"42777","doi":"10.22331/q-2021-05-27-461","year":"2021","title":"Spectrally multimode integrated SU(1,1) interferometer","status":"public","publication_identifier":{"issn":["2521-327X"]},"author":[{"id":"65609","last_name":"Ferreri","first_name":"Alessandro","full_name":"Ferreri, Alessandro"},{"id":"55095","orcid":"0000-0001-5718-358X","first_name":"Matteo","last_name":"Santandrea","full_name":"Santandrea, Matteo"},{"id":"42777","full_name":"Stefszky, Michael","first_name":"Michael","last_name":"Stefszky"},{"id":"36389","first_name":"Kai Hong","last_name":"Luo","orcid":"0000-0003-1008-4976","full_name":"Luo, Kai Hong"},{"full_name":"Herrmann, Harald","first_name":"Harald","last_name":"Herrmann","id":"216"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"},{"last_name":"Sharapova","first_name":"Polina R.","full_name":"Sharapova, Polina R.","id":"60286"}],"publication_status":"published","date_updated":"2026-01-16T10:22:10Z"},{"doi":"10.1103/physreva.100.053829","article_number":"053829","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-12-16T11:28:33Z","intvolume":"       100","title":"Temporally multimode four-photon Hong-Ou-Mandel interference","year":"2019","publication_identifier":{"issn":["2469-9926","2469-9934"]},"author":[{"first_name":"Alessandro","last_name":"Ferreri","full_name":"Ferreri, Alessandro","id":"65609"},{"full_name":"Ansari, V.","last_name":"Ansari","first_name":"V."},{"last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263"},{"id":"60286","last_name":"Sharapova","first_name":"Polina R.","full_name":"Sharapova, Polina R."}],"type":"journal_article","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"date_created":"2023-01-26T14:12:28Z","issue":"5","publication":"Physical Review A","user_id":"16199","volume":100,"_id":"40384","publisher":"American Physical Society (APS)","status":"public","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"}],"citation":{"short":"A. Ferreri, V. Ansari, C. Silberhorn, P.R. Sharapova, Physical Review A 100 (2019).","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>.","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>","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} }","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>","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>."}}]