Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 13: Quantum Optics and Photonics II
Q 13.4: Vortrag
Montag, 11. März 2019, 15:00–15:15, S Gr. HS Maschb.
Integrated transition edge sensors on lithium niobate waveguides — •Jan Philipp Höpker1, Thomas Gerrits2, Adriana Lita2, Harald Herrmann1, Raimund Ricken1, Viktor Quiring1, Richard Mirin2, Sae Woo Nam2, Christine Silberhorn1, and Tim Bartley1 — 1Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 2National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA
Lithium niobate is a versatile platform for integrated quantum optics due to its low-loss waveguiding, a high second order susceptibility and its electro-optic properties. Many different tools for quantum optics applications have been realized on this platform including single-photon sources and modulators. However, the integration of single-photon detectors on these waveguides is challenging. Superconducting single photon detectors combine high detection efficiency at telecom wavelength with outstanding signal-to-noise ratio. In particular, transition edge sensors (TESs) combine these abilities with an intrinsic photon-number resolution and negligible dark counts. Combining these detectors and the lithium niobate platform enables a new variety of complex on-chip experiments. Recently, we were able to show in a first proof-of-principle-experiment the evanescent detection of single photons with on-chip TESs on a lithium niobate waveguide. We investigated the efficiency, photon-number resolution, polarization sensitivity for the evanescent coupling, and different detector geometries.