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Experimental investigation of photoluminescence dynamics of cavity polaritons under nonresonant excitation

Authors Liu, BL
Xu, ZY
Wang, BS
Deng, YM
Yang, FH
Ge, WK HKUST affiliated (currently or previously)
Issue Date 2001
Source Journal OF physics-condensed MATTER , v. 13, (37), 2001, SEP 17, p. 8467-8474
Summary Low-temperature time-resolved photoluminescence (PL) experiments have been performed on a semiconductor planar microcavity, which contains two sets of three In0.13Ga0.87As/GaAs quantum wells embedded in a 3 lambda /2 GaAs cavity. The spontaneous emission dynamics of both lower- and upper-branch polaritons is investigated as a function of exciton-cavity detuning under nonresonant optical excitation. It is found that the PL decay times of both branches are independent of cavity detuning while the PL rising kinetics of the lower- and upper-branch polaritons exhibits a significant difference. The rise time of the upper polarition branch shows a strong dependence on cavity detuning, while the rise time of the lower polarition branch is less sensitive to cavity detuning. Our results can be well understood in the framework of the theoretical prediction of Tassone et al.
Note Journal of Physics: Condensed Matter © copyright (2001) IOP Publishing Ltd. The Journal's web site is located at
ISSN 0953-8984
Language English
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