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Studies of photoreflectance in Cd_(1-x)Mn_xTe/Cd_(1-y)Mn_yTe superlattices

机译:Cd_(1-x)Mn_xTe / Cd_(1-y)Mn_yTe超晶格中光反射的研究

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Photoreflectance spectroscopy has been performed on a series of Cd_(1-x)Mn_xTe/Cd_(1-y)Nm_yTe superlattices. Samples were grown on (001) GaAs substrates by molecular-beam epitaxy with different barriers (x chemical bounds 0.3 to 0.8) and wells (y chemical bounds 0 to 0.01). After taking into consideration the strain-induced and quantum confinement effects, the exciton transition energies of the heavy and light holes can be determined using envelope-function calculations. The clculations are in good agreement with the photoreflectance measurement results. These results show that photoreflectance is a powerful probe for the study of quantized state structures in superlattices.
机译:对一系列Cd_(1-x)Mn_xTe / Cd_(1-y)Nm_yTe超晶格进行了光反射光谱分析。样品通过分子束外延在(001)GaAs衬底上生长,分子束外延具有不同的势垒(x化学范围为0.3至0.8)和孔(y化学范围为0至0.01)。考虑到应变引起的和量子限制的影响后,可以使用包络函数计算确定重孔和轻孔的激子跃迁能。所述聚集物与光反射率测量结果非常吻合。这些结果表明,光反射是研究超晶格中量子态结构的有力探针。

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