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首页> 外文期刊>Physica status solidi, B. Basic research >High-excitation effects in the optical properties of delta-doped ZnSe quantum wells
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High-excitation effects in the optical properties of delta-doped ZnSe quantum wells

机译：高激发效应对掺quantumZnSe量子阱光学特性的影响

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摘要

The influence of high-density optical excitation on n-doped ZnSe/(Zn,Mg)(S,Se) quantum wells is studied by quasi-stationary photoluminescence and pump-probe experiments. In photoluminescence, the trion and exciton transitions saturate weakly with increasing excitation density. This is accompanied by superlinearly growing low- and high-energy wings attributed to collisions in the dense system of excitons, trions and carriers. For non-resonant excitation, a strong heating of the background carrier gas takes place and collisions lead to an effective recombination already during the relaxation of the electron-hole pairs down to the bottom of the band. This process limits reachable exciton and trion densities under quasi-stationary excitation. [References: 8]
机译：通过准静态光致发光和泵浦探针实验研究了高密度光激发对n掺杂ZnSe /（Zn，Mg）（S，Se）量子阱的影响。在光致发光中，随着激发密度的增加，三重子和激子跃迁弱饱和。这伴随着超线性增长的低能和高能机翼，这归因于激子，三重子和载子的密集系统中的碰撞。对于非共振激发，背景载气强烈加热，并且在电子空穴对向下弛豫至带的底部期间，碰撞已经导致有效的复合。这个过程限制了准稳态激发下可达到的激子和三重子密度。 [参考：8]

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