Integrated superconducting nanowire single-photon detectors on titanium
  in-diffused lithium niobate waveguides

Höpker, Jan Philipp; Verma, Varun B.; Protte, Maximilian; Ricken, Raimund; Quiring, Viktor; Eigner, Christof; Ebers, Lena; Hammer, Manfred; Foerstner, Jens; Silberhorn, Christine; Mirin, Richard P.; Nam, Sae Woo; Bartley, Tim J.

doi:10.48550/arXiv.2104.12500

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Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides

Version 2 2023-06-08, 12:44

Version 1 2023-01-11, 22:37

preprint

posted on 2023-06-08, 12:44 authored by Jan Philipp Höpker, Varun B. Verma, Maximilian Protte, Raimund Ricken, Viktor Quiring, Christof Eigner, Lena Ebers, Manfred Hammer, Jens Foerstner, Christine Silberhorn, Richard P. Mirin, Sae Woo Nam, Tim J. Bartley

We demonstrate the integration of amorphous tungsten silicide superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides. We show proof-of-principle detection of evanescently-coupled photons of 1550nm wavelength using bidirectional waveguide coupling for two orthogonal polarization directions. We investigate the internal detection efficiency as well as detector absorption using coupling-independent characterization measurements. Furthermore, we describe strategies to improve the yield and efficiency of these devices.