Electrically driven single-photon emission from an isolated single molecule

Li Zhang, Yun-Jie Yu, Liu-Guo Chen, Yang Luo, Ben Yang, Fan-Fang Kong, Gong Chen, Yang Zhang (), Qiang Zhang, Yi Luo, Jin-Long Yang, Zhen-Chao Dong () and J. G. Hou ()
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Li Zhang: University of Science and Technology of China
Yun-Jie Yu: University of Science and Technology of China
Liu-Guo Chen: University of Science and Technology of China
Yang Luo: University of Science and Technology of China
Ben Yang: University of Science and Technology of China
Fan-Fang Kong: University of Science and Technology of China
Gong Chen: University of Science and Technology of China
Yang Zhang: University of Science and Technology of China
Qiang Zhang: University of Science and Technology of China
Yi Luo: University of Science and Technology of China
Jin-Long Yang: University of Science and Technology of China
Zhen-Chao Dong: University of Science and Technology of China
J. G. Hou: University of Science and Technology of China

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Electrically driven molecular light emitters are considered to be one of the promising candidates as single-photon sources. However, it is yet to be demonstrated that electrically driven single-photon emission can indeed be generated from an isolated single molecule notwithstanding fluorescence quenching and technical challenges. Here, we report such electrically driven single-photon emission from a well-defined single molecule located inside a precisely controlled nanocavity in a scanning tunneling microscope. The effective quenching suppression and nanocavity plasmonic enhancement allow us to achieve intense and stable single-molecule electroluminescence. Second-order photon correlation measurements reveal an evident photon antibunching dip with the single-photon purity down to g (2)(0) = 0.09, unambiguously confirming the single-photon emission nature of the single-molecule electroluminescence. Furthermore, we demonstrate an ultrahigh-density array of identical single-photon emitters.

Date: 2017
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DOI: 10.1038/s41467-017-00681-7

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