Open AccessTwo-round quasi-whispering gallery mode exciton polaritons with large Rabi splitting in a GaN microrod
Author(s) -
Guanlong Yu,
Junchao Li,
Hui Zong,
Ming Lei,
Huanqing Chen,
Rui Lang,
Shukun Li,
Muhammad Saddique Akbar Khan,
Xiaodong Hu
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.442540
Subject(s) - polariton , whispering gallery wave , exciton , whispering gallery , optics , physics , photon , photoluminescence , dispersion (optics) , exciton polaritons , condensed matter physics , laser
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.