Plasmon-enhanced ZnO whispering-gallery mode lasing
ZnO microcavity, surface plasmon, whispering-gallery mode
ABSTRACT Collaborative enhancements from surface plasmons (SPs) and whispering-gallery modes (WGMs) can induce intense near-field effects with high spatial localization around the surface of a semiconducting material. One can construct a highly efficient hybrid microcavity using semiconducting materials through resonant coupling between SPs and WGMs. Hexagonal ZnO micro-/nanostructures, which have been employed as natural WGM microcavities for ultraviolet (UV) lasing, can be used as ideal platforms to construct such hybrid microcavities. Here, we comprehensively review the recent efforts for improving lasing performance by resonant coupling between SPs and WGMs. Traditional SPs originating from various metals as well as novel SPs originating from atomic layers such as graphene are considered. Moreover, we discuss the mechanism of light-matter interactions beyond the improvements in lasing performance.
Tsinghua University Press
Chunxiang Xu,Feifei Qin,Qiuxiang Zhu,Junfeng Lu,Yueyue Wang,Jitao Li,Yi Lin,Qiannan Cui,Zengliang Shi,Arumugam Gowri Manohari, Plasmon-enhanced ZnO whispering-gallery mode lasing. NanoRes.2018, 11(6): 3050–3064