Crossover from polariton lasing to exciton lasing in a strongly coupled ZnO microcavity

Ying Yu Lai, Yu Hsun Chou, Yu Pin Lan, Tien Chang Lu, Shing Chung Wang, Yoshihisa Yamamoto

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14 Citations (Scopus)

Abstract

Unlike conventional photon lasing, in which the threshold is limited by the population inversion of the electron-hole plasma, the exciton lasing generated by exciton-exciton scattering and the polariton lasing generated by dynamical condensates have received considerable attention in recent years because of the sub-Mott density and low-threshold operation. This paper presents a novel approach to generate both exciton and polariton lasing in a strongly coupled microcavity (MC) and determine the critical driving requirements for simultaneously triggering these two lasing operation in temperature <140 K and large negative polariton-exciton offset (<-133 meV) conditions. In addition, the corresponding lasing behaviors, such as threshold energy, linewidth, phase diagram, and angular dispersion are verified. The results afford a basis from which to understand the complicated lasing mechanisms in strongly coupled MCs and verify a new method with which to trigger dual laser emission based on exciton and polariton.

Original languageEnglish
Article number20581
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Feb 3

All Science Journal Classification (ASJC) codes

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