The optical properties of quantum dots (QDs) are of interest to many researchers. In this study, the optical coeefficients analyzed include the optical absorption, the refractive index; both the linear and nonlinear cases together with the electric field effect. The electronic structures of the disc-like and spherical QDs are calculated by using the effective-mass approximation. The results show that the total change in the refractive index and the optical absorption increase with increasing QD size, the peaks are shifted with the changing QD size. The nonlinear optical properties increase with the external electric field and the optical intensity. Comparison of QD types shows that the peaks are red-shifted for the disc-like QD and lower than those in the spherical QD case.

中文翻译：

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盘状和球形量子点的光学特性比较

许多研究人员对量子点 (QD) 的光学特性感兴趣。在本研究中，分析的光学系数包括光吸收、折射率；线性和非线性情况以及电场效应。使用有效质量近似计算盘状和球形量子点的电子结构。结果表明，随着QD尺寸的增加，折射率和光吸收的总变化量增加，峰随着QD尺寸的变化而移动。非线性光学特性随着外部电场和光强度的增加而增加。量子点类型的比较表明，圆盘状量子点的峰值红移，低于球形量子点的峰值。