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

Abstract

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.

7 pages, 6 figures

References in corpus (5)

• Integrated Photonic Quantum Technologies
• Superconducting nanowire single-photon detectors: physics and applications
• High-speed linear optics quantum computing using active feed-forward
• Superconducting Nanowire Single-Photon Detectors for Quantum Information
• Single-photon detection and cryogenic reconfigurability in Lithium Niobate nanophotonic circuits