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Electrically driven single-photon emission from an isolated single molecule

2017; Nature Portfolio; Volume: 8; Issue: 1 Linguagem: Inglês

10.1038/s41467-017-00681-7

2041-1723

Li Zhang, Yunjie Yu, Liuguo Chen, Yang Luo, Ben Yang, Fan-Fang Kong, Chen Gong, Yang Zhang, Qiang Zhang, Yi Luo, Jinlong Yang, Zhen‐Chao Dong, Jian Hou,

Force Microscopy Techniques and Applications

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.