Quantum interference of two photons emitted from a luminescence center in GaAs:N
Michio Ikezawa, Liao Zhang, Yoshiki Sakuma, Yasuaki Masumoto · Applied Physics Letters · 2017
The indistinguishability of photons emitted from a nitrogen luminescence center in GaAs is investigated by two-photon interference under nonresonant optical excitation. A clear dip is observed in a parallel polarization configuration for consecutively emitted two photons with a 2-ns time interval. The indistinguishability is approximately 0.24, and is found to be independent of the time interval between 2 ns and 4 ns. These results suggest the existence of a very fast dephasing mechanism within 2 ns.