Nb impurity-bound excitons as quantum emitters in monolayer WS2

Leyi Loh, Yi Wei Ho, Fengyuan Xuan, Andrés Granados Águila, Yuan Chen, See Yoong Wong, Jingda Zhang, Zhe Wang, Kenji Watanabe, Takashi Taniguchi, Paul J. Pigram, Michel Bosman, Su Ying Quek (), Maciej Koperski () and Goki Eda ()
Additional contact information
Leyi Loh: National University of Singapore
Yi Wei Ho: National University of Singapore
Fengyuan Xuan: National University of Singapore
Andrés Granados Águila: National University of Singapore
Yuan Chen: National University of Singapore
See Yoong Wong: La Trobe University Melbourne
Jingda Zhang: National University of Singapore
Zhe Wang: National University of Singapore
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Paul J. Pigram: La Trobe University Melbourne
Michel Bosman: National University of Singapore
Su Ying Quek: National University of Singapore
Maciej Koperski: National University of Singapore
Goki Eda: National University of Singapore

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Point defects in crystalline solids behave as optically addressable individual quantum systems when present in sufficiently low concentrations. In two-dimensional (2D) semiconductors, such quantum defects hold potential as versatile single photon sources. Here, we report the synthesis and optical properties of Nb-doped monolayer WS2 in the dilute limit where the average spacing between individual dopants exceeds the optical diffraction limit, allowing the emission spectrum to be studied at the single-dopant level. We show that these individual dopants exhibit common features of quantum emitters, including narrow emission lines (with linewidths

Date: 2024
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DOI: 10.1038/s41467-024-54360-5

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