{"abstract":[{"text":"Interference between single photons is key for many quantum optics experiments and applications in quantum technologies, such as quantum communication or computation. It is advantageous to operate the systems at telecommunication wavelengths and to integrate the setups for these applications in order to improve stability, compactness and scalability. A new promising material platform for integrated quantum optics is lithium niobate on insulator (LNOI). Here, we realise Hong-Ou-Mandel (HOM) interference between telecom photons from an engineered parametric down-conversion source in an LNOI directional coupler. The coupler has been designed and fabricated in house and provides close to perfect balanced beam splitting. We obtain a raw HOM visibility of (93.5 ± 0.7) %, limited mainly by the source performance and in good agreement with off-chip measurements. This lays the foundation for more sophisticated quantum experiments in LNOI.","lang":"eng"}],"title":"Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler","date_updated":"2023-07-05T07:58:31Z","intvolume":"        31","issue":"14","department":[{"_id":"15"},{"_id":"230"},{"_id":"623"},{"_id":"288"}],"volume":31,"author":[{"orcid":"https://orcid.org/0000-0002-1568-2580","first_name":"Silia","id":"63231","last_name":"Babel","full_name":"Babel, Silia"},{"full_name":"Bollmers, Laura","last_name":"Bollmers","id":"61375","first_name":"Laura"},{"full_name":"Massaro, Marcello","last_name":"Massaro","first_name":"Marcello","id":"59545","orcid":"0000-0002-2539-7652"},{"last_name":"Luo","full_name":"Luo, Kai Hong","first_name":"Kai Hong","id":"36389","orcid":"0000-0003-1008-4976"},{"id":"42777","first_name":"Michael","last_name":"Stefszky","full_name":"Stefszky, Michael"},{"full_name":"Pegoraro, Federico","last_name":"Pegoraro","first_name":"Federico","id":"88928"},{"last_name":"Held","full_name":"Held, Philip","id":"68236","first_name":"Philip"},{"full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald","id":"216"},{"first_name":"Christof","id":"13244","last_name":"Eigner","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin","id":"27150","first_name":"Benjamin"},{"full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura","id":"40300"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"}],"publication_identifier":{"issn":["1094-4087"]},"doi":"10.1364/oe.484126","date_created":"2023-07-03T14:08:36Z","publication_status":"published","publication":"Optics Express","language":[{"iso":"eng"}],"publisher":"Optica Publishing Group","type":"journal_article","keyword":["Atomic and Molecular Physics","and Optics"],"citation":{"chicago":"Babel, Silia, Laura Bollmers, Marcello Massaro, Kai Hong Luo, Michael Stefszky, Federico Pegoraro, Philip Held, et al. “Demonstration of Hong-Ou-Mandel Interference in an LNOI Directional Coupler.” <i>Optics Express</i> 31, no. 14 (2023). <a href=\"https://doi.org/10.1364/oe.484126\">https://doi.org/10.1364/oe.484126</a>.","mla":"Babel, Silia, et al. “Demonstration of Hong-Ou-Mandel Interference in an LNOI Directional Coupler.” <i>Optics Express</i>, vol. 31, no. 14, 23140, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/oe.484126\">10.1364/oe.484126</a>.","apa":"Babel, S., Bollmers, L., Massaro, M., Luo, K. H., Stefszky, M., Pegoraro, F., Held, P., Herrmann, H., Eigner, C., Brecht, B., Padberg, L., &#38; Silberhorn, C. (2023). Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler. <i>Optics Express</i>, <i>31</i>(14), Article 23140. <a href=\"https://doi.org/10.1364/oe.484126\">https://doi.org/10.1364/oe.484126</a>","short":"S. Babel, L. Bollmers, M. Massaro, K.H. Luo, M. Stefszky, F. Pegoraro, P. Held, H. Herrmann, C. Eigner, B. Brecht, L. Padberg, C. Silberhorn, Optics Express 31 (2023).","ieee":"S. Babel <i>et al.</i>, “Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler,” <i>Optics Express</i>, vol. 31, no. 14, Art. no. 23140, 2023, doi: <a href=\"https://doi.org/10.1364/oe.484126\">10.1364/oe.484126</a>.","bibtex":"@article{Babel_Bollmers_Massaro_Luo_Stefszky_Pegoraro_Held_Herrmann_Eigner_Brecht_et al._2023, title={Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler}, volume={31}, DOI={<a href=\"https://doi.org/10.1364/oe.484126\">10.1364/oe.484126</a>}, number={1423140}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Massaro, Marcello and Luo, Kai Hong and Stefszky, Michael and Pegoraro, Federico and Held, Philip and Herrmann, Harald and Eigner, Christof and Brecht, Benjamin and et al.}, year={2023} }","ama":"Babel S, Bollmers L, Massaro M, et al. Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler. <i>Optics Express</i>. 2023;31(14). doi:<a href=\"https://doi.org/10.1364/oe.484126\">10.1364/oe.484126</a>"},"article_number":"23140","year":"2023","user_id":"63231","_id":"45850","status":"public"}