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; Zhichuan Niu

doi:10.1186/s11671-020-03358-1

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

Nanoscale Res Lett. 2020 Jul 9;15(1):145. doi: 10.1186/s11671-020-03358-1.

Authors

Shulun Li^{1

2

3}, Yao Chen^{1

4}, Xiangjun Shang¹, Ying Yu⁵, Jiawei Yang⁵, Junhui Huang^{1

2}, Xiangbin Su¹, Jiaxin Shen^{1

6}, Baoquan Sun^{1

2}, Haiqiao Ni^{7

8

9}, Xingliang Su¹⁰, Kaiyou Wang^{1

2

3}, Zhichuan Niu^{1

2

3}

Affiliations

¹ State Key Laboratory for Superlattice and Microstructures, Institute of Semiconductors,Chinese Academy of Sciences, Beijing, 100083, China.
² Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences, Beijing, 100049, China.
³ Beijing Academy of Quantum Information Sciences, Beijing, 100193, China.
⁴ Institute of Photonics and Photonic Technology, Northwest University, Xian, 710127, China.
⁵ State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China.
⁶ School of Microelectronics, Xidian University and The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xian, 710071, China.
⁷ State Key Laboratory for Superlattice and Microstructures, Institute of Semiconductors,Chinese Academy of Sciences, Beijing, 100083, China. nihq@semi.ac.cn.
⁸ Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences, Beijing, 100049, China. nihq@semi.ac.cn.
⁹ Beijing Academy of Quantum Information Sciences, Beijing, 100193, China. nihq@semi.ac.cn.
¹⁰ Laboratory of Solid Quantum Material Center, College of Physics and Electronic Engineering, Shanxi University, Taiyuan, 030006, China.

Abstract

We proposed a precise calibration process of Al _0.9Ga_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.

Keywords: Cavity mode; Micropillar; Single-photon source; Weak coupling regime.