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We proposed a precise calibration process of Al  0.9  Ga  0.1 As/GaAs DBR micropillar cavity to match the single InAs/GaAs quantum dot (QD) exciton emission and achieve cavity mode resonance and a great enhancement of QD photoluminescence (PL) intensity. Light-matter interaction of single QD in DBR micropillar cavity (Q ∼ 3800) under weak coupling regime was investigated by temperature-tuned PL spectra; a pronounced enhancement (14.6-fold) of QD exciton emission was observed on resonance. The second-order autocorrelation measurement shows  g  (2) (0)=0.070, and the estimated net count rate before the first objective lens reaches 1.6×10 7  counts/s under continuous wave excitation, indicating highly pure single-photon emission at high count rates.

Boost of single-photon emission by perfect coupling of InAs/GaAs quantum dot and micropillar cavity mode