Polariton lasing in a ZnO microwire above 450 K

Journal Article · Mon Feb 24 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4866385· OSTI ID:22293102

Xu, Dan; Xie, Wei; Liu, Wenhui; Wang, Jian; Zhang, Long; Wang, Yinglei; Zhang, Saifeng; Sun, Liaoxin; Shen, Xuechu; Chen, Zhanghai ^[1]

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1. State Key Laboratory of Surface Physics, Department of Physics and Laboratory of Advanced Materials, Fudan University, Shanghai 200433 (China)

Exciton-polariton lasing in a one-dimensional ZnO microcavity is demonstrated at high temperature of 455 K. The massive occupation of the polariton ground state above a distinct pump power threshold is clearly demonstrated by using the angular resolved spectroscopy under non-resonant excitation. The temperature dependence of the polariton lasing threshold is well interpreted by two competing mechanisms, i.e., the thermodynamic and kinetic mechanisms. Michelson interference measurements are performed to investigate the temporal and spatial coherence of polariton laser, with the coherence time and coherence length being τ{sub c}∼0.97 ps and r{sub c}∼0.72μm at 440 K and 400 K, respectively.

• OSTI ID: 22293102
• Journal Information: Applied Physics Letters, Vol. 104, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAVITY RESONATORS
COHERENCE LENGTH
EXCITATION
GROUND STATES
KINETICS
LASERS
POLARONS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
THERMODYNAMICS
ZINC OXIDES