{"intvolume":"         4","article_type":"original","date_updated":"2025-03-19T16:03:25Z","publication_status":"published","publication_identifier":{"issn":["2770-0208"]},"author":[{"first_name":"Christian","last_name":"Kießler","full_name":"Kießler, Christian","id":"44252"},{"last_name":"Kirsch","first_name":"Michelle","full_name":"Kirsch, Michelle","id":"69553"},{"id":"44373","first_name":"Sebastian","last_name":"Lengeling","full_name":"Lengeling, Sebastian"},{"full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald","id":"216"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"}],"year":"2025","title":"SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides","doi":"10.1364/optcon.557439","language":[{"iso":"eng"}],"article_number":"593","abstract":[{"text":"<jats:p>Stable and bright single photon sources are key components for future quantum applications. A simple fabrication method is an important requirement for such sources. Here, we present a single photon source based on diced ridge waveguides in titanium indiffused LiNbO<jats:sub>3</jats:sub>. These waveguides can be easily fabricated by combining planar titanium in-diffusion without lithographic patterning and easy-to-handle precision dicing. Such devices have the potential to generate high single photon rates because ridge structures are typically less prone to the photorefractive effect. We achieve waveguide propagation losses &lt;0.4dBcm and a SHG conversion efficiency of about 81%Wcm<jats:sup>2</jats:sup>. Harnessing a type-0 SPDC process to generate 1550 nm photons, we obtain a SPDC brightness of 3⋅10<jats:sup>5</jats:sup>1s⋅mW⋅nm, with a heralding efficiency of <jats:italic>η</jats:italic><jats:sub>h</jats:sub>=45% (<jats:italic>η</jats:italic><jats:sub>h,wg</jats:sub>=77.5% for the waveguide itself excluded setup losses) and a heralded second-order correlation function of <jats:italic>g</jats:italic><jats:sub>h</jats:sub><jats:sup>2</jats:sup>(0)&lt;0.003 at low pump powers.</jats:p>","lang":"eng"}],"issue":"3","publication":"Optics Continuum","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2025-03-19T10:56:04Z","status":"public","volume":4,"user_id":"216","_id":"59069","publisher":"Optica Publishing Group","citation":{"apa":"Kießler, C., Kirsch, M., Lengeling, S., Herrmann, H., &#38; Silberhorn, C. (2025). SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides. <i>Optics Continuum</i>, <i>4</i>(3), Article 593. <a href=\"https://doi.org/10.1364/optcon.557439\">https://doi.org/10.1364/optcon.557439</a>","ieee":"C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, and C. Silberhorn, “SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides,” <i>Optics Continuum</i>, vol. 4, no. 3, Art. no. 593, 2025, doi: <a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>.","chicago":"Kießler, Christian, Michelle Kirsch, Sebastian Lengeling, Harald Herrmann, and Christine Silberhorn. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO<sub>3</sub> Waveguides.” <i>Optics Continuum</i> 4, no. 3 (2025). <a href=\"https://doi.org/10.1364/optcon.557439\">https://doi.org/10.1364/optcon.557439</a>.","short":"C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, C. Silberhorn, Optics Continuum 4 (2025).","mla":"Kießler, Christian, et al. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO<sub>3</sub> Waveguides.” <i>Optics Continuum</i>, vol. 4, no. 3, 593, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>.","ama":"Kießler C, Kirsch M, Lengeling S, Herrmann H, Silberhorn C. SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides. <i>Optics Continuum</i>. 2025;4(3). doi:<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>","bibtex":"@article{Kießler_Kirsch_Lengeling_Herrmann_Silberhorn_2025, title={SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides}, volume={4}, DOI={<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>}, number={3593}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Kießler, Christian and Kirsch, Michelle and Lengeling, Sebastian and Herrmann, Harald and Silberhorn, Christine}, year={2025} }"}}