A three-dimensional, polarization-insensitive superconducting nanowire avalanche photodetector

作者：Verma V B^*; Marsili F; Harrington S; Lita A E; Mirin R P; Nam S W

来源：Applied Physics Letters, 2012, 101(25): 251114.

DOI：10.1063/1.4768788

We demonstrate an approach to improving the detection efficiency, removing the polarization dependence, and increasing the signal-to-noise ratio of conventional superconducting nanowire single photon detectors (SNSPDs) by vertically stacking two WSi SNSPDs and electrically connecting them in parallel, forming a three-dimensional superconducting nanowire avalanche photodetector. We measure a peak system detection efficiency of 87.7% +/- 60.5% and a polarization dependence of less than 2%, representing nearly an order of magnitude improvement in both system detection efficiency and reduction of polarization dependence compared to conventional SNSPDs. [http://dx.doi.org/10.1063/1.4768788]

• 出版日期2012-12-17