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

Research output: Contribution to journalArticlepeer-review

42 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 languageEnglish
Article number211101
JournalApplied Physics Letters
Volume96
Issue number21
DOIs
Publication statusPublished - 24 May 2010

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