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Microcrystals Modulated Exciton-Polariton Emissions from Single ZnO@ZnO:Ga Microwire

Photonics Research
  • Mingming Jiang, Wangqi Mao, Jiaolong Ji, Peng Wan, Xiangbo Zhou, and Caixia Kan
  • received 07/30/2019; accepted 11/25/2019; posted 11/27/2019; Doc. ID 374101
  • Abstract: Due to the outstanding surface-to-volume ratio, highly smooth surface and well-defined crystal boundary, semiconducting micro/nanocrystals have been utilized as pivotal platform to fabricate multifunctional optoelectronic devices, such as super resolution imaging, solar concentrators, photodetectors, light-emitting diodes (LEDs), lasers, etc. Especially, the micro/nanocrystal being foreseen as the key elements can be employed to tailor the fundamental optical and electronic transport properties of the integrated hetero/homostructures. Herein, ZnO microcrystals decorated pre-synthesized Ga-doped ZnO microwire (ZnO@ZnO:Ga MW) was prepared. The single ZnO@ZnO:Ga MW can be utilized to construct optically pumped Fabry-Perot (F-P) mode microlasers, with the dominating lasing peaks centered in the violet spectral region. In particular, 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, it can be anticipated that the waveguiding lighting behavior and energy-band alignment of ZnO microcrystals sheathed ZnO:Ga MW radial structures are extremely attractive for potential application that hammer at semiconducting microstructures based optoelectronic devices, such as micro-LEDs, laser microcavities, waveguides, photodetectors, etc.
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