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Waveguide Single-Photon Detectors for Integrated Quantum Photonics

Andrea Fiore, Alessandro Gaggero, J. P. Sprengers, Dondu Sahin, S. Jahanmiri Nejad, David Bitauld, Johannes Beetz, M. Lermer, Martin Kamp, Sven Höfling, F. Mattioli, Roberto Leoni

Published Jan 1, 2011• 3 citations
Publisher

Abstract

We report the first waveguide single-photon detectors. They are based on superconducting nanowires patterned on top of GaAs/AlGaAs waveguides and are suitable for monolithic integration with single-photon sources and passive quantum optical networks.
DOI
10.1364/cleo_si.2011.pdpc3

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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2013•0 citations
The monolithic integration of single-photon sources, passive optical circuits, and single-photon detectors enables complex and scalable quantum photonic integrated circuits, for application in linear-optics quantum computing and quantum communications. Here, we demonstrate a key component of such a circuit, a waveguide single-photon detector. Our detectors, based on superconducting nanowires on GaAs ridge waveguides, provide high efficiency (∼20%) at telecom wavelengths, high timing accuracy (∼60 ps), and response time in the ns range and are fully compatible with the integration of single-photon sources, passive networks, and modulators.
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The implementation of single-photon detectors in waveguide photonic circuits will open the possibility of experiments in quantum regime that would otherwise be impossible to be implemented using bulk optics. Nanowire superconducting single-photon detectors (SSPDs) are good candidates for integration due to their relative ease of fabrication on top of GaAs heterostructures. In this paper we show the experimental demonstration of single-photon detectors, based on superconducting nanowires, fully integrated with GaAs/AlGaAs ridge waveguides. We will discuss all the major challenges surmounted and all the steps necessary to achieve these results.