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International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)

Modelling superconducting nanowire single photon detectors in a waveguide-based ring resonator

Gerardo E. Villarreal-Garcia, Nicola A. Tyler, Jorge Barreto, Damien Bonneau, Dondu Sahin, Jeremy L. O’Brien, Mark G. Thompson

Published Jul 1, 2016• 0 citations
Publisher

Abstract

We present an analysis of a single photon detector system capable of achieving near-unity detection efficiency. It consist of waveguide-coupled superconducting nanowires as short as 1 μm embedded in a racetrack resonator.
DOI
10.1109/nusod.2016.7547011

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In this work we report on a single photon detector system which offers near-unity detection efficiency using waveguide-coupled superconducting nanowires with lengths on the order of 1 μm. This is achieved by embedding the nanowires in a racetrack resonator where the interaction time with the photons trapped in the cavity is increased, thereby allowing for shorter nanowires. We expect this to lead to a higher fabrication yield as the amount of inhomogeneities decreases for shorter nanowires. Our simulations show a system with a 1 μm long superconducting nanowire single photon detector (SNSPD) operating at near-unity detection efficiency using design parameters that can be realistically achieved with conventional fabrication processes. The resonant cavity introduces spectral selectivity to the otherwise broad-band SNSPDs and the cavity induced timing jitter is shown to be insignificant for SNSPDs longer than 1 μm.
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