Efficiently Coupling Light to Superconducting Nanowire Single-Photon Detectors
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We designed superconducting nanowire single-photon detectors (SNSPDs) integrated with silver optical antennae for free-space coupling and a dielectric waveguide for fiber coupling. According to our finite-element simulation, (1) for the free-space coupling, the absorptance of the NbN nanowire for TM-polarized photons at the wavelength of 1550 nm can be as high as 96% by adding silver optical antennae; (2) for the fiber coupling, the absorptance of the NbN nanowire for TE-like-polarized photons can reach 76% including coupling efficiency at the wavelength of 1550 nm by adding a silicon nitride waveguide and an inverse-taper coupler.
Date issued
2009-07Department
Lincoln Laboratory; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
IEEE Transactions on Applied Superconductivity
Publisher
Institute of Electrical and Electronics Engineers
Citation
Xiaolong Hu et al. “Efficiently Coupling Light to Superconducting Nanowire Single-Photon Detectors.” Applied Superconductivity, IEEE Transactions on 19.3 (2009): 336-340. © 2009 Institute of Electrical and Electronics Engineers
Version: Final published version
ISSN
1051-8223
Keywords
single-photon detectors, plasmons, optical waveguides, niobium nitride