Xing Ding

Yu-Ming He; Genevieve Clark; John R. Schaibley; Yu He; Ming-Cheng Chen; Yu-Jia Wei; Xing Ding; Qiang Zhang; Wang Yao; Xiaodong Xu; Chao-Yang Lu; Jian-Wei Pan

Single quantum emitters (SQEs) are at the heart of quantum optics and photonic quantum-information technologies. To date, all the demonstrated solid-state single-photon sources are confined to one-dimensional (1D; ref. 3) or 3D materials. Here, we report a new class of SQEs based on excitons that are spatially localized by defects in 2D tungsten-diselenide (WSe2) monolayers. The optical emission from these SQEs shows narrow linewidths of ∼130 μeV, about two orders of magnitude smaller than those of delocalized valley excitons. Second-order correlation measurements revealed a strong photon antibunching, which unambiguously established the single-photon nature of the emission. The SQE emission shows two non-degenerate transitions, which are cross-linearly polarized. We assign this fine structure to two excitonic eigenmodes whose degeneracy is lifted by a large ∼0.71 meV coupling, probably because of the electron-hole exchange interaction in the presence of anisotropy. Magneto-optical measurements also reveal an exciton g factor of ∼8.7, several times larger than those of delocalized valley excitons. In addition to their fundamental importance, establishing new SQEs in 2D quantum materials could give rise to practical advantages in quantum-information processing, such as an efficient photon extraction and a high integratability and scalability.

Xing Ding; Yu He; Z.-C. Duan; Niels Gregersen; Ming-Cheng Chen; Sebastian Unsleber; Sebastian Maier; Christian Schneider; M. Kamp; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Scalable photonic quantum technologies require on-demand single-photon sources with simultaneously high levels of purity, indistinguishability, and efficiency. These key features, however, have only been demonstrated separately in previous experiments. Here, by s-shell pulsed resonant excitation of a Purcell-enhanced quantum dot-micropillar system, we deterministically generate resonance fluorescence single photons which, at π pulse excitation, have an extraction efficiency of 66%, single-photon purity of 99.1%, and photon indistinguishability of 98.5%. Such a single-photon source for the first time combines the features of high efficiency and near-perfect levels of purity and indistinguishabilty, and thus opens the way to multiphoton experiments with semiconductor quantum dots.

Hui Wang; Yu He; Yu-Huai Li; Zu-En Su; Bo Li; He-Liang Huang; Xing Ding; Ming-Cheng Chen; C. Liu; Jian Qin; J. Li; Yu-Ming He; Christian Schneider; M. Kamp; Cheng-Zhi Peng; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Hui Wang; Z.-C. Duan; Yin-Hai Li; Si Chen; J. Li; Y. M. He; Ming-Cheng Chen; Yu He; Xing Ding; Cheng-Zhi Peng; Christian Schneider; M. Kamp; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Yu He; Xing Ding; He-Liang Huang; Jian Qin; Chong Wang; Sebastian Unsleber; Chao Chen; Hongtao Wang; Yu-Ming He; X. Wang; W. J. Zhang; S. J. Chen; Christian Schneider; M. Kamp; Lixing You; Z. G. Wang; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Hui Wang; Wei Li; Xiao Jiang; Yu-Ming He; Yu-Huai Li; Xing Ding; Ming-Cheng Chen; Jian Qin; Cheng-Zhi Peng; Christian Schneider; M. Kamp; Weijun Zhang; Hao Li; Lixing You; Zhen Wang; Jonathan P. Dowling; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Hui Wang; Yu He; Yu-Huai Li; Zu-En Su; Bo Li; He-Liang Huang; Xing Ding; Ming-Cheng Chen; C. Liu; Jian Qin; J. Li; Yu-Ming He; Christian Schneider; M. Kamp; Cheng-Zhi Peng; Sven Hoefling; Chao-Yang Lu; Jian-Wei Pan

Han-sen Zhong; Yuan Li; Wei Li; Li-Chao Peng; Zu-En Su; Yi Hu; Yu-Ming He; Xing Ding; Wen-Zhuo Zhang; Hao Li; Liang Zhang; Zhen Wang; Lixing You; Xi-Lin Wang; Xiao Jiang; Li Li; Yu-Ao Chen; Nai-Le Liu; Chao-Yang Lu; Jian-Wei Pan

Yu-Ming He; Hui Wang; Stefan Gerhardt; K. Winkler; Jonathan Jurkat; Ying Yu; Ming-Cheng Chen; Xing Ding; Si Chen; Jin Qian; Zhao-Chen Duan; J. Li; Lin-Jun Wang; Yong-Heng Huo; Siyuan Yu; Sven Höfling; Chao-Yang Lu; Jian-Wei Pan

Chao Chen; Xing Ding; Jian Qin; Yu He; Yi-Han Luo; Ming-Cheng Chen; C. Liu; Xi-Lin Wang; Weijun Zhang; Hao Li; Lixing You; Zhen Wang; Da-Wei Wang; Barry C. Sanders; Chao-Yang Lu; Jian-Wei Pan