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

Shulun Li, Yao Chen, Xiangjun Shang, Ying Yu, Jiawei Yang, Junhui Huang, Xiangbin Su, Jiaxin Shen, Baoquan Sun, Haiqiao Ni, Xingliang Su, Kaiyou Wang (+1 others)
2020 Nanoscale Research Letters  
We proposed a precise calibration process of Al 0.9Ga0.1As/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
more » ... onance. The second-order autocorrelation measurement shows g(2)(0)=0.070, and the estimated net count rate before the first objective lens reaches 1.6×107 counts/s under continuous wave excitation, indicating highly pure single-photon emission at high count rates.
doi:10.1186/s11671-020-03358-1 pmid:32648067 fatcat:4bd374vaunca5e676giffvrb4y