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

• Main Authors: Shulun Li, Yao Chen, Xiangjun Shang, Ying Yu, Jiawei Yang, Junhui Huang, Xiangbin Su, Jiaxin Shen, Baoquan Sun, Haiqiao Ni, Xingliang Su, Kaiyou Wang, Zhichuan Niu
• Format: Article
• Language: English
• Published: SpringerOpen 2020-07-01
• Series: Nanoscale Research Letters
• Subjects: Single-photon source; Micropillar; Cavity mode; Weak coupling regime
• Online Access: http://link.springer.com/article/10.1186/s11671-020-03358-1

Abstract We proposed a precise calibration process of Al 0.9 Ga 0.1As/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 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.