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首页> 美国卫生研究院文献>Nanoscale Research Letters >Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: effects of applied electric field and hydrostatic pressure
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Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: effects of applied electric field and hydrostatic pressure

机译：量子环中与施主杂质相关的线性和非线性带内光吸收系数：施加的电场和静水压力的影响

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摘要

The linear and nonlinear intraband optical absorption coefficients in GaAs three-dimensional single quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and electric field, applied along the growth direction of the heterostructure, the energies of the ground and first excited states of a donor impurity have been found using the effective mass approximation and a variational method. The energies of these states are examined as functions of the dimensions of the structure, electric field, and hydrostatic pressure. We have also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as a function of incident photon energy for several configurations of the system. It is found that the variation of distinct sizes of the structure leads to either a redshift and/or a blueshift of the resonant peaks of the intraband optical spectrum. In addition, we have found that the application of an electric field leads to a redshift, whereas the influence of hydrostatic pressure leads to a blueshift (in the case of on-ring-center donor impurity position) of the resonant peaks of the intraband optical spectrum.
机译：研究了GaAs三维单量子环中的线性和非线性带内光吸收系数。考虑到沿着异质结构的生长方向施加的静水压力和电场的共同作用，已经使用有效质量近似和变分方法找到了基体能量和施主杂质的第一激发态。根据结构的尺寸，电场和静水压力检查这些状态的能量。对于系统的几种配置，我们还研究了线性，非线性和总光吸收系数与入射光子能量的关系。已经发现，结构的不同尺寸的变化导致带内光谱的共振峰的红移和/或蓝移。另外，我们发现，施加电场会导致红移，而静水压力的影响会导致带内光学共振峰的蓝移（在环中心施主杂质位置的情况下）光谱。

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