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Nonlinear phase-resolved polariton spectroscopy in ZnSe epilayers

机译:ZnSe外延层中的非线性相分辨极化子光谱

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The influence of thermalized carriers on the exciton polariton propagation in a semiconductor ZnSe layer is investigated by reflection spectroscopy. Reflected laser pulses are characterized in amplitude and phase by using the method of spectral interferometry (SI). The complex coefficient of reflection is given for the low excitation density by a broadened Elliot formula. For increasing density scattering between the carriers and the laser-induced polarization is accounted by the solution of the semiconductor Bloch equations. In the spectral phase we find a delicate dependence of a pi-jump at the heavy-hole resonance of the carrier density while the spectral amplitude practically remains the same. (c) 2004 Elsevier Ltd. All rights reserved.
机译:通过反射光谱研究了热载流子对半导体ZnSe层中激子极化子传播的影响。通过使用光谱干涉法(SI)可以在振幅和相位上表征反射的激光脉冲。对于低激发密度,通过扩展的艾略特公式给出了复杂的反射系数。为了增加密度,通过半导体布洛赫方程的解考虑了载流子之间的散射和激光诱导的偏振。在频谱阶段,我们发现π跃迁在载流子密度的重空穴共振时具有微妙的依赖性,而频谱幅度实际上保持不变。 (c)2004 Elsevier Ltd.保留所有权利。

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