Open AccessStrong bound exciton-photon coupling in ZnO whispering gallery microcavity
Author(s) -
Liaoxin Sun,
Hongxing Dong,
Wei Xie,
Jian Lü,
Zhanghai Chen,
Xuechu Shen,
Wei Lü
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.030227
Subject(s) - exciton , whispering gallery wave , polariton , cathodoluminescence , whispering gallery , optical microcavity , physics , biexciton , photon , coupling (piping) , optics , bound state , cavity quantum electrodynamics , optoelectronics , materials science , atomic physics , condensed matter physics , laser , luminescence , quantum , quantum mechanics , open quantum system , metallurgy
We report the cathodoluminescence (CL) study of bound-exciton-polaritons in ZnO whispering gallery (WG) microcavity. Thanks to the very high spatial resolution (: 100 nm) of CL technique, a scanning CL mapping along the tapered ZnO nanowire is achieved. We observe a clear anticrossing behavior which demonstrates the strong coupling between cavity mode and bound-excitons. Coupled oscillator model including both bound excitons and free excitons fits well with the experimental results. The energy splitting of bound-exciton-polaritons:2.6 meV is obtained.