Electrically driven single-photon emission from an isolated single molecule

Li Zhang(University of Science and Technology of China), Yunjie Yu(University of Science and Technology of China), Liuguo 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), Chen Gong(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), Jinlong Yang(University of Science and Technology of China), Zhen‐Chao Dong(University of Science and Technology of China), Jian Hou(University of Science and Technology of China)
Nature Communications
September 12, 2017
10.1038/s41467-017-00681-7
Cited by 141Open Access
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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.

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