Operating quantum waveguide circuits with superconducting single-photon detectors

C. M. Natarajan; A. Peruzzo; S. Miki; M. Sasaki; Z. Wang; B. Baek; S. Nam; R. H. Hadfield; J. L. O'Brien

doi:10.1063/1.3413948

Operating quantum waveguide circuits with superconducting single-photon detectors

C. M. Natarajan, A. Peruzzo, S. Miki, M. Sasaki, Z. Wang, B. Baek, S. Nam, R. H. Hadfield, J. L. O'Brien

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

Advanced quantum information science and technology (QIST) applications place exacting demands on optical components. Quantum waveguide circuits offer a route to scalable QIST on a chip. Superconducting single-photon detectors (SSPDs) provide infrared single-photon sensitivity combined with low dark counts and picosecond timing resolution. In this study, we bring these two technologies together. Using SSPDs we observe a two-photon interference visibility of 92.3±1.0% in a silica-on-silicon waveguide directional coupler at ?=804 nm-higher than that measured with silicon detectors (89.9±0.3%). We further operated controlled-NOT gate and quantum metrology circuits with SSPDs. These demonstrations present a clear path to telecom-wavelength quantum waveguide circuits. © 2010 American Institute of Physics.

Original language	English
Article number	211101
Journal	Applied Physics Letters
Volume	96
Issue number	21
DOIs	https://doi.org/10.1063/1.3413948
Publication status	Published - 24 May 2010

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AU - Peruzzo, A.

AU - Miki, S.

AU - Sasaki, M.

AU - Wang, Z.

AU - Baek, B.

AU - Nam, S.

AU - Hadfield, R. H.

AU - O'Brien, J. L.

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Operating quantum waveguide circuits with superconducting single-photon detectors

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