Development of WSi superconducting single photon detectors

Dr Shouyi Xie
4pm Thursday 13 April 2017
CQC2T Conference Room, Level 2 Newton Building, UNSW

Single photon detectors are essential elements in the field of quantum optics. Amongst all the existing detector technologies, superconducting single photon detectors (SSPDs) based on WSi material turned out to be promising due to their high efficiency at near infrared wavelengths, fast recovery time, low timing jitter and low dark count rate. Moreover, the as-deposited WSi film is amorphous and highly uniform. The fabricated devices thus show high reproducibility and are more robust to the substrate defects. In this talk we report on the development of fibre-coupled WSi SSPDs including fabrication and characterisation. We will also present the integration of WSi SSPDs on waveguides for their potential application in on-chip optical circuits.