Opto-Electronic Advances, Vol. 3, Issue 1, 190017-1 (2020)
Controlling plasmon-exciton interactions through photothermal reshaping
Aiqin Hu1,2, Shuai Liu1,3, Jingyi Zhao1, Te Wen1, Weidong Zhang1, Qihuang Gong1,2, Yongqiang Meng3, Yu Ye1, and Guowei Lu1,2,*
- 1State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Center of Quantum Matter, Nano-optoelectronics Frontier Center of the Ministry of Education, School of Physics, Peking University, Beijing 100871, China
- 2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
- 3School of Materials Science and Engineering, Hebei University of Science and Tech-nology, Shijiazhuang 050018, China
We investigated the plasmon-exciton interactions in an individual gold nanorod (GNR) with monolayer MoS2 at room temperature with the single-particle spectroscopy technique. To control the plasmon-exciton interaction, we tuned the local surface plasmon resonance of an individual GNR in-situ by employing the photothermal reshaping effect. The scattering spectra of the GNR-MoS2 hybrids exhibited two dips at the frequencies of the A and B excitons of monolayer MoS2, which were caused by the plasmon-induced resonance energy transfer effect. The resonance energy transfer rate increased when the surface plasmon resonance of the nanorod matched well with the exciton transition energy. Also, we demonstrated that the plasmon-enhanced fluorescence process dominated the photoluminescence of the GNR-MoS2 hybrid. These results provide a flexible way to control the plasmon-exciton interaction in an all-solid-state operating system at room temperature.
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