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

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.

SUBMITTER: Li S

PROVIDER: S-EPMC7347735 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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

Li Shulun S Chen Yao Y Shang Xiangjun X Yu Ying Y Yang Jiawei J Huang Junhui J Su Xiangbin X Shen Jiaxin J Sun Baoquan B Ni Haiqiao H Su Xingliang X Wang Kaiyou K Niu Zhichuan Z

Nanoscale research letters 20200709 1

We proposed a precise calibration process of Al <sub>0.9</sub>Ga<sub>0.1</sub>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 r ...[more]

PMID: 32648067

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