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Phase diagram of a polariton laser from cryogenic to room temperature

机译:从低温到室温的极化子激光的相图

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The signature of the strong-coupling regime is unambiguously evidenced in a GaN-based microcavity (MC) above the polariton lasing threshold P_(thr) at room temperature through the observation of the upper polariton branch. The MC system exhibits a renormalization of the polariton dispersion curve, namely, a reduced normal-mode splitting compared to the low-density regime. Next the dependence of P_(thr) as a function of exciton-photon detuning is investigated in the 4-340 K temperature range, which allows accessing the polariton lasing phase diagram. The observation of polariton lasing over such a broad range of temperatures reveals a clear transition from a kinetic to a thermodynamic regime with increasing temperature.
机译:通过观察上极化子分支,在高于极化子激光阈值P_(thr)的GaN基微腔(MC)中,可以清楚地证明强耦合机制的特征。 MC系统展现出极化子色散曲线的重新归一化,即与低密度模式相比,减少了正常模式分裂。接下来,研究在4-340 K温度范围内P_(thr)与激子-光子失谐的关系,这可以访问极化子激射相图。在如此宽的温度范围内对极化子激射的观察表明,随着温度的升高,从动力学到热力学状态都有明显的转变。

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