Natarajan, C.M., Peruzzo, A., Miki, S., Sasaki, M., Wang, Z., Baek, B., Nam, S., Hadfield, R.H. and O’Brien, J.L. (2010) Operating quantum waveguide circuits with superconducting single-photon detectors. Applied Physics Letters, 96(21), p. 211101. (doi: 10.1063/1.3413948)
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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 λ = 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.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Hadfield, Professor Robert |
Authors: | Natarajan, C.M., Peruzzo, A., Miki, S., Sasaki, M., Wang, Z., Baek, B., Nam, S., Hadfield, R.H., and O’Brien, J.L. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Applied Physics Letters |
ISSN: | 0003-6951 |
Published Online: | 24 May 2010 |
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