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Estimation of the lateral dimensions of epitaxial submonolayer CdSe/ZnSe quantum dots

机译:外延亚底层CDSE / ZnSe量子点的横向尺寸的估计

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CdSe fractional monolayer quantum dots (FMQDs) embedded in a ZnSe matrix were produced by atomic layer epitaxy with a nominal coverage of 0.5 monolayer. They have a thickness of a/2, where a is the strained perpendicular lattice constant of cubic CdSe. Their photoluminescence spectra at low temperature exhibit narrow and intense excitonic emission around 2.759 eV. Based on the experimental excitonic emission energy and applying the factorized-envelope approximation, we have estimated that the lateral dimensions of these FMQDs are around 4-5 nm and their density is similar to 3x1012
机译:通过原子层外延产生嵌入ZnSe基质中的Cdse分数单层量子点(FMQDS),其标称覆盖物为0.5单层。 它们具有A / 2的厚度,其中A是立方CDSE的应变垂直晶格常数。 低温下的光致发光光谱表现出窄且激烈的激烈发射左右约为2.759eV。 基于实验激发性发射能量并应用分解包络近似,我们估计这些FMQDS的横向尺寸约为4-5nm,其密度类似于3×1012

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