A deterministic quantum dot micropillar single photon source with >65% extraction efficiency based on fluorescence imaging method

Shunfa Liu; Yuming Wei; Rongling Su; Rongbin Su; Ben Ma; Zesheng Chen; Haiqiao Ni; Zhichuan Niu; Ying Yu; Yujia Wei; Xuehua Wang; Siyuan Yu

doi:10.1038/s41598-017-13433-w

A deterministic quantum dot micropillar single photon source with >65% extraction efficiency based on fluorescence imaging method

Sci Rep. 2017 Oct 25;7(1):13986. doi: 10.1038/s41598-017-13433-w.

Authors

Shunfa Liu¹, Yuming Wei¹, Rongling Su¹, Rongbin Su¹, Ben Ma^{2

3}, Zesheng Chen^{2

3}, Haiqiao Ni^{2

3}, Zhichuan Niu^{2

3}, Ying Yu⁴, Yujia Wei⁵, Xuehua Wang¹, Siyuan Yu^{1

6}

Affiliations

¹ State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China.
² State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing, 100083, China.
³ Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China.
⁴ State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China. [email protected].
⁵ State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China. [email protected].
⁶ Photonics Group, Merchant Venturers School of Engineering, University of Bristol, Bristol, BS8 1UB, UK.

Abstract

We report optical positioning of single quantum dots (QDs) in planar distributed Bragg reflector (DBR) cavity with an average position uncertainty of ≈20 nm using an optimized photoluminescence imaging method. We create single-photon sources based on these QDs in determined micropillar cavities. The brightness of the QD fluorescence is greatly enhanced on resonance with the fundamental mode of the cavity, leading to an high extraction efficiency of 68% ± 6% into a lens with numerical aperture of 0.65, and simultaneously exhibiting low multi-photon probability (g⁽²⁾(0) = 0.144 ± 0.012) at this collection efficiency.

Publication types

Research Support, Non-U.S. Gov't