Two-round quasi-whispering gallery mode exciton polaritons with large Rabi splitting in a GaN microrod

We investigate the exciton polaritons and their corresponding optical modes in a hexagonal GaN microrod at room temperature. The dispersion curves are measured by the angle-resolved micro-photoluminescence spectrometer, and two types of exciton polaritons are identified with the help of the finite-d...

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Veröffentlicht in:Optics express 2021-11, Vol.29 (24), p.39788-39800
Hauptverfasser: Yu, Guo, Li, Junchao, Zong, Hua, Lei, Menglai, Chen, Huanqing, Lang, Rui, Li, Shukun, Akbar Khan, Muhammad Saddique, Hu, Xiaodong
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Sprache:eng
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Zusammenfassung:We investigate the exciton polaritons and their corresponding optical modes in a hexagonal GaN microrod at room temperature. The dispersion curves are measured by the angle-resolved micro-photoluminescence spectrometer, and two types of exciton polaritons are identified with the help of the finite-difference time-domain simulation. By changing the pump position, the photon part of the exciton polaritons is found to switch between the quasi-whispering gallery modes and the two-round quasi-whispering gallery modes. The exciton polaritons formed by the latter are observed and distinguished for the first time, with a giant Rabi splitting as large as 2Ω = 230.3 meV.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.442540