Quantum frequency down-conversion of single photons at 1552 nm from single InAs quantum dot

Ma Ben^{1, 2, 3}, Wei Si-Hang^{1, 2, 3}, Chen Ze-Sheng^{1, 2, 3}, Shang Xiang-Jun^{1, 2, 3}, Ni Hai-Qiao^{1, 2, 3}, Niu Zhi-Chuan^{1, 2, 3, †}

(color online) Selected QD for frequency conversion experiment. (a) μPL spectra, wavelength at 864.04 nm at 4 K. (b) The g⁽²⁾(τ) measurement of emission line in panel (a) under 140 μW cw excitation power, the dip to a value of g⁽²⁾(0) = 0.187.