We study the effects of multilevel mixing of the 1s and 2s states of the E1-HH1 and E2-HH1 excitons in the emission spectra of an undoped quantum well. This is done by investigating the E1-HH1 exciton emission spectra in the presence of an intense CO/sub 2/ laser near resonance with the transition between El and E2. Our results show that, depending on the frequency of the CO/sub 2/ laser, these spectra are quenched peculiarly. We explain these phenomena based on the frequency dependence of the mixing configurations of the exciton states and infrared enhancement of the nonradiative decay rates of E1-HH1 excitons. We also study the effect of the nonparabolicity of the hole subband (HH1) in the infrared mixing of the E1-HH1 and E2-HH1 excitons.
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机译:我们研究了未掺杂量子阱发射光谱中E1-HH1和E2-HH1激子的1s和2s状态的多级混合效应。这是通过研究在强烈的CO / sub 2 /激光接近共振以及E1和E2之间跃迁的情况下研究E1-HH1激子发射光谱来完成的。我们的结果表明,取决于CO / sub 2 /激光的频率,这些光谱会被特异地淬灭。我们基于激子态混合结构的频率依赖性和E1-HH1激子的非辐射衰减率的红外增强来解释这些现象。我们还研究了空穴子带(HH1)的非抛物线性对E1-HH1和E2-HH1激子的红外混合的影响。
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