Efficiently Coupling Light to Superconducting Nanowire Single-Photon Detectors

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...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2009-06, Vol.19 (3), p.336-340
Main Authors: Xiaolong Hu, Holzwarth, C.W., Masciarelli, D., Dauler, E.A., Berggren, K.K.
Format: Article
Language:English
Subjects:
Applied sciences
Detectors
Electrical engineering. Electrical power engineering
Electromagnets
Electronics
Exact sciences and technology
High speed optical techniques
Joining
Materials
Materials science and technology
Nanocomposites
Nanomaterials
Nanostructure
Nanowires
Niobium nitride
Optical computing
Optical coupling
Optical fiber communication
Optical fiber couplers
Optical fibers
Optical waveguides
Optoelectronic devices
Photons
plasmons
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Silver
single-photon detectors
Superconducting devices
Superconducting photodetectors
Superconductivity
Various equipment and components
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Summary: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.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2009.2018035