PT Journal
AU Xiaolong Hu
   Holzwarth, CW
   Masciarelli, D
   Dauler, EA
   Berggren, KK
TI Efficiently coupling light to superconducting nanowire single-photon detectors
SO IEEE Trans. Appl. Supercond.
PY 2009
BP 336
EP 340
VL 19
IS 3
DE optical antennas; SNSPD
AB 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.
ER