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首页> 外文期刊>Journal of Crystal Growth >Strained quantum wells in scrolled structures studied by μ-photoluminescence
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Strained quantum wells in scrolled structures studied by μ-photoluminescence

机译：滚动结构中的应变量子阱，通过μ-光致发光研究

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摘要

We investigate the impact of the specific strain gradient on the optical properties of quantum well (QW) structures. This strain gradient emerges if the layer stack is released from the underlying substrate forming a scroll. As the strain state in this configuration changes from compressive to tensile strain the character of the fundamental optical transition in a strained QW is modified. Polarization-dependent low-temperature u-photoluminescence studies reveal that in all the examined QWs in scrolled structures the valence band has a mixed heavy/light hole like character in agreement with calculations. Therefore, for the interpretation of optical and electronic transport properties of double heterojunctions with a strongly curved geometry the actual built-in strain has to be considered.
机译：我们调查特定应变梯度对量子阱（QW）结构的光学特性的影响。如果将叠层从下面的基底上释放下来并形成涡旋，就会出现这种应变梯度。当此配置中的应变状态从压缩应变变为拉伸应变时，应变QW中基本光学跃迁的特性会发生变化。偏振相关的低温u-光致发光研究表明，在所有检查的滚动结构QW中，价带具有混合的重/轻孔状特征，与计算一致。因此，为了解释具有强烈弯曲几何形状的双异质结的光学和电子传输特性，必须考虑实际的内置应变。

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