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Proceedings Paper

High absorption efficiency and polarization-insensitivity in superconducting-nanowire single-photon detectors
Author(s): Luca Redaelli; Gabriele Bulgarini; Sergiy Dobrovolskiy; Sander Dorenbos; Anna Mukhtarova; Val Zwiller; Eva Monroy; Jean-Michel Gérard
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Paper Abstract

The performance of superconducting-nanowire single-photon detectors depends on the efficiency of light absorption in the ultrathin (3-8 nm) superconducting nanowire. In this work, we will discuss two approaches to boost light absorption: coupling the nanowire to the evanescent field propagating in a waveguide and enclosing the nanowire in an optical cavity. The latter method is the most widely used, but it is intrinsically very sensitive to the polarization of light. To overcome this issue, we propose some innovative cavity designs which make use of high-index (n >2) dielectrics. With this technique, highly-efficient polarization-insensitive devices can be easily implemented.

Paper Details

Date Published: 27 January 2017
PDF: 9 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101112K (27 January 2017); doi: 10.1117/12.2252332
Show Author Affiliations
Luca Redaelli, Univ. Grenoble Alpes (France)
CEA, INAC-PHELIQS (France)
Gabriele Bulgarini, Single Quantum B.V. (Netherlands)
Sergiy Dobrovolskiy, Single Quantum B.V. (Netherlands)
Sander Dorenbos, Single Quantum B.V. (Netherlands)
Anna Mukhtarova, Univ. Grenoble Alpes (France)
CEA, INAC-PHELIQS (France)
Val Zwiller, Univ. Grenoble Alpes (France)
CEA, INAC-PHELIQS (France)
Technische Univ. Delft (Netherlands)
Eva Monroy, Univ. Grenoble Alpes (France)
CEA, INAC-PHELIQS (France)
Jean-Michel Gérard, Univ. Grenoble Alpes (France)
CEA, INAC-PHELIQS (France)


Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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