Fabrication Process Yielding Saturated Nanowire Single-Photon Detectors With 24-ps Jitter
Faraz Najafi, Andrew E. Dane, Francesco Bellei, Qingyuan Zhao, Kristen A. Sunter, Adam N. McCaughan, Karl K. Berggren · IEEE Journal of Selected Topics in Quantum Electronics · 2014
We present an optimized fabrication process for superconducting nanowire single-photon detectors that allowed us to obtain a yield of ~70% for detectors based on 80-nm-wide niobium nitride nanowires. We fabricated detectors that showed 24-ps timing jitter and saturated detection efficiency without the need for cryogenic amplifiers, allowing for operation in a low-bias low-dark-count-rate regime while operating at maximum detection efficiency.