Photon number resolving detection with high speed and high quantum efficiency
Daiji Fukuda, Go Fujii, Takayuki Numata, Akio Yoshizawa, Hidemi Tsuchida, H. Fujino, Hiroyuki Ishii, Taro Itatani, Shuichiro Inoue, Tatsuya Zama · Metrologia · 2009
Photon number resolving detectors based on titanium-transition edge sensors with high speed and high quantum efficiency have been developed for quantum sensors in the fields of quantum information and quantum radiometry. The two devices optimized at wavelengths of interest showed 81% and 64% system detection efficiencies at 850 nm and 1550 nm, respectively. The response speed of the device optimized for a high counting operation is 190 ns, which corresponds to a counting rate over 1 MHz.