Crossover from photon to exciton-polariton lasing
Crossover from photon to exciton-polariton lasing
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DOI：
10.1088/1367-2630/14/10/105003
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发表时间：
2012-10-02
影响因子：
3.3
通讯作者：
Lagoudakis, Pavlos G.
中科院分区：
文献类型：
--
作者：
Kammann, Elena;Ohadi, Hamid;Lagoudakis, Pavlos G.
本文报道了半导体微腔中光子与激子-极化激元激光交叉的实时观测结果。在高功率激发脉冲之后的不同时间观察到两个激光相位。能量，时间和角度分辨测量允许载流子分布和有效温度的瞬态特性。我们发现签名的玻色-爱因斯坦凝聚，即宏观占领的基态和窄化的线宽在两个激光制度。的Bernard-Douraffourgh条件的反转进行了测试和极化激元激光器以及光子激光器在连续波激发下被发现在低于理论预测的反转阈值的估计密度操作。
We report on a real-time observation of the crossover between photon and exciton-polariton lasing in a semiconductor microcavity. Both lasing phases are observed at different times after a high-power excitation pulse. Energy-, time- and angle-resolved measurements allow for the transient characterization of carrier distribution and effective temperature. We find signatures of Bose-Einstein condensation, namely macroscoping occupation of the ground state and narrowing of the linewidth in both lasing regimes. The Bernard-Douraffourgh condition for inversion was tested and the polariton laser as well as the photon laser under continuous wave excitation were found to operate at estimated densities below the theoretically predicted inversion threshold.