29 March 2013 Waveguide superconducting single-photon autocorrelators for quantum photonic applications
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We report a novel component for integrated quantum photonic applications, a waveguide single-photon autocorrelator. It is based on two superconducting nanowire detectors patterned onto the same GaAs ridge waveguide. Combining the electrical output of the two detectors in a correlation card enables the measurement of the second-order correlation function g(2) (τ), which realizes the functionality of a Hanbury-Brown and Twiss experiment in a very compact integrated device. Each detector shows a polarization-independent quantum efficiency of ~0.5-1% at 1300 nm. This autocorrelator represents a key building block for quantum photonic integrated circuits including single-photon sources and linear optics.
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D. Sahin, D. Sahin, A. Gaggero, A. Gaggero, G. Frucci, G. Frucci, S. Jahanmirinejad, S. Jahanmirinejad, J. P. Sprengers, J. P. Sprengers, F. Mattioli, F. Mattioli, R. Leoni, R. Leoni, J. Beetz, J. Beetz, M. Lermer, M. Lermer, M. Kamp, M. Kamp, S. Höfling, S. Höfling, A. Fiore, A. Fiore, } "Waveguide superconducting single-photon autocorrelators for quantum photonic applications", Proc. SPIE 8635, Advances in Photonics of Quantum Computing, Memory, and Communication VI, 86351B (29 March 2013); doi: 10.1117/12.2004510; https://doi.org/10.1117/12.2004510

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