Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Photonics II
Q 44.2: Vortrag
Donnerstag, 9. März 2017, 11:15–11:30, P 11
Towards integrating superconducting detectors on lithium niobate waveguides — •Jan Philipp Höpker1, Evan Meyer-Scott1, Moritz Bartnick1, Frederik Thiele1, Nicola Montaut1, Harald Hermann1, Sebastian Lengeling1, Raimund Ricken1, Viktor Quiring1, Stephan Krapick1, Matteo Santandrea1, Adriana Lita2, Varun Verma2, Thomas Gerrits2, Sae Woo Nam2, Christine Silberhorn1, and Tim J. Bartley1 — 1Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn — 2National Institute of Standards and Technology, 325 Broadway, Boulder, CO, 80305, USA
Depositing superconducting detectors onto optical waveguides is a promising way to achieve precise single photon detection in integrated optical circuits. We have taken the initial steps in depositing transition edge sensors (TES) and superconducting nanowire single photon detectors (SNSPDs) on titanium in-diffused lithium niobate waveguides. At room temperature, the excess transmission loss is measured with a Fabry-Pérot etalon technique, which gives information about the detector absorption of the deposited TES and SNSPDs without wiring them. Furthermore, simulations are carried out to optimize the detector structures and include additional dielectric layers for better absorption efficiencies. To test the devices at cryogenic temperatures, the coupling to optical fibres via end-face pigtailing is investigated, using a precise motorized stage and UV-glue. Together with our pigtailing technique and the superconducting detectors we expect to be able to make a functional integrated single photon detection device.