Photon number resolving detector based on a quantum dot field effect transistor
Beata E. Kardynal, S. S. Hees, Andrew J. Shields, Christine A. Nicoll, Ian A. Farrer, D. A. Ritchie · Applied Physics Letters · 2007
The authors show that the change in current flowing through the channel of a quantum dot field effect transistor is proportional to the number (N) of photons absorbed from an incident pulse. Distinct features due to photon number state up to N=3 are resolved. With improvement of external quantum efficiency the device may form a useful photon number resolving detector.