On-demand semiconductor source of entangled photons which simultaneously has high fidelity, efficiency, and indistinguishability

Hui Wang, Hai Hu, T. -H. Chung, Jian Qin, Xiaoxia Yang, Jin-Peng Li, Ren-Ze Liu, Han-Sen Zhong, Yu-Ming He, Xing Ding, Yu-Hao Deng, C. Schneider, Qing Dai, Yong-Heng Huo, Sven Höfling, Chao-Yang Lu, Jian-Wei Pan

Research output: Contribution to journalArticlepeer-review

238 Citations (Scopus)

Abstract

An outstanding goal in quantum optics and scalable photonic quantum technology is to develop a source that each time emits one and only one entangled photon pair with simultaneously high entanglement fidelity, extraction efficiency, and photon indistinguishability. By coherent two-photon excitation of a single InGaAs quantum dot coupled to a circular Bragg grating bullseye cavity with broadband high Purcell factor up to 11.3, we generate entangled photon pairs with a state fidelity of 0.90(1), pair generation rate of 0.59(1), pair extraction efficiency of 0.62(6), and photon indistinguishability of 0.90(1) simultaneously. Our work will open up many applications in high-efficiency multi-photon experiments and solid-state quantum repeaters.
Original languageEnglish
Article number113602
JournalPhysical Review Letters
Volume122
Issue number11
DOIs
Publication statusPublished - 22 Mar 2019

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