Photonics Research, 2020, 8 (2): 02000175, Published Online: Feb. 10, 2020   

Microcrystal modulated exciton-polariton emissions from single ZnO@ZnO:Ga microwire Download: 570次

Author Affiliations
1 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 Key Laboratory for Intelligent Nano Materials and Devices (MOE), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
3 e-mail: cxkan@nuaa.edu.cn
Abstract
Due to their outstanding surface-to-volume ratio, highly smooth surface, and well-defined crystal boundary, semiconducting micro-/nanocrystals have been used as a pivotal platform to fabricate multifunctional optoelectronic devices, such as superresolution imaging devices, solar concentrators, photodetectors, light-emitting diodes (LEDs), and lasers. In particular, micro-/nanocrystals as key elements can be employed to tailor the fundamental optical and electronic transport properties of integrated hetero-/homostructures. Herein, ZnO microcrystal-decorated pre-synthesized Ga-doped ZnO microwire (ZnO@ZnO:Ga MW) was prepared. The single ZnO@ZnO:Ga MW can be used to construct optically pumped Fabry–Perot (F–P) mode microlasers, with the dominating lasing peaks centered in the violet spectral region. Stabilized exciton-polariton emissions from single ZnO@ZnO:Ga MW-based heterojunction diode can also be realized. The deposited ZnO microcrystals can facilitate the strong coupling of F–P optical modes with excitons, leading to the formation of exciton-polariton features in the ZnO@ZnO:Ga MW. Therefore, the waveguiding lighting behavior and energy-band alignment of ZnO microcrystal-sheathed ZnO:Ga MW radial structures should be extremely attractive for potential applications in semiconducting microstructure-based optoelectronic devices, such as micro-LEDs, laser microcavities, waveguides, and photodetectors.

Wangqi Mao, Mingming Jiang, Jiaolong Ji, Peng Wan, Xiangbo Zhou, Caixia Kan. Microcrystal modulated exciton-polariton emissions from single ZnO@ZnO:Ga microwire[J]. Photonics Research, 2020, 8(2): 02000175.

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