Multi-channel waveguide-integrated superconducting nanowire single-photon detector system for ultrafast quantum key distribution

Robin Terhaar; Matthias Häußler; Helge Gehring; Martin Wolff; Fabian Beutel; Nicolai Walter; Wladick Hartmann; Max Tillmann; Michael Wahl; Tino Röhlicke; Andreas Bülter; Doreen Wernicke; Nicolas Perlot; Jasper Rödiger; Carsten Schuck; Wolfram Pernice

doi:10.1117/12.2609887

5 March 2022 Multi-channel waveguide-integrated superconducting nanowire single-photon detector system for ultrafast quantum key distribution

Robin Terhaar, Matthias Häußler, Helge Gehring, Martin Wolff, Fabian Beutel, Nicolai Walter, Wladick Hartmann, Max Tillmann, Michael Wahl, Tino Röhlicke, Andreas Bülter, Doreen Wernicke, Nicolas Perlot, Jasper Rödiger, Carsten Schuck, Wolfram Pernice

Author Affiliations +

Proceedings Volume 12009, Quantum Sensing and Nano Electronics and Photonics XVIII; 120090K (2022) https://doi.org/10.1117/12.2609887
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Upcoming quantum technologies require scalable and cost-efficient technical solutions for widespread functionality. In order to exploit the quantum states of light, single-photon detectors are essential for application. Here, we present a low-footprint plug-and-play multi-channel single-photon detector system featuring integrated photonics that allows for ultra-fast quantum key distribution (QKD). Each channel comprises a superconducting nanowire single-photon detector (SNSPD) patterned from a niobium-titanium nitride (NbTiN) superconducting film atop silicon nitride waveguide structures. Subsequently, the on-chip photonics are interfaced by broadband 3D polymeric fiber-to-chip couplers to the ports of an 8x8 fiber array. The readout electronics allow for individual evaluation of up to 64 channels simultaneously. Integrated to a QKD experiment, a pair of the system's detection channels achieves secret key rates of up to 2.5 Mbit/s employing a coherent one-way protocol.

Conference Presentation

Citation Download Citation

Robin Terhaar, Matthias Häußler, Helge Gehring, Martin Wolff, Fabian Beutel, Nicolai Walter, Wladick Hartmann, Max Tillmann, Michael Wahl, Tino Röhlicke, Andreas Bülter, Doreen Wernicke, Nicolas Perlot, Jasper Rödiger, Carsten Schuck, and Wolfram Pernice "Multi-channel waveguide-integrated superconducting nanowire single-photon detector system for ultrafast quantum key distribution", Proc. SPIE 12009, Quantum Sensing and Nano Electronics and Photonics XVIII, 120090K (5 March 2022); https://doi.org/10.1117/12.2609887

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available