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Title: Polariton lasing in a ZnO microwire above 450 K

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.
Authors:
; ; ; ; ; ; ; ; ;  [1]
  1. State Key Laboratory of Surface Physics, Department of Physics and Laboratory of Advanced Materials, Fudan University, Shanghai 200433 (China)
Publication Date:
OSTI Identifier:
22293102
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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