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Q: Fachverband Quantenoptik und Photonik

Q 51: Poster: Quantum Optics and Photonics IV

Q 51.61: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal

Towards integrating superconducting detectors on lithium niobate waveguides — •Jan Philipp Höpker¹, Frederik Thiele¹, Moritz Bartnick¹, Stephan Krapick¹, Evan Meyer-Scott¹, Nicola Montaut¹, Harald Hermann¹, Raimund Ricken¹, Viktor Quiring¹, Torsten Meier¹, Adriana Lita², Varun Verma², Thomas Gerrits², Richard Mirin², Sae Woo Nam², Christine Silberhorn¹, and Tim Bartley¹ — ¹Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn — ²National Institute of Standards and Technology, 325 Broadway, Boulder, CO, 80305, USA

Superconducting photon detectors and integrated optics have enabled a variety of quantum optical experiments. Lithium niobate is a promising platform for quantum photonics thanks to its large second order nonlinear susceptibility, large electro-optic coefficient, and low guiding losses. Therefore, lithium niobate works very well for fast modulation and single photon sources. However, detecting single photons inside lithium niobate waveguides remains a challenge. Fiber-coupled superconducting nanowire single photon detectors (SNSPDs) and transition edge sensors (TESs) show outstanding quantum efficiency with low dark count rates. We have taken the initial steps in depositing these detectors on lithium niobate waveguides, including room temperature absorption measurements, cryogenic flood illumination tests, and the investigation of fiber-pigtailing for cryogenic environments.