Effects of hydrostatic pressure, temperature and Al-concentration on the second-harmonic generation of tuned quantum dot/ring under a perpendicular magnetic field

被引：12

作者：

Duan, Yiming ^{[1
]}

Li, Xuechao ^{[1
]}

Chang, Ceng ^{[1
]}

Zhao, Zhuang ^{[1
]}

Zhang, Liangcheng ^{[1
]}

机构：

[1] Anhui Univ Sci & Technol, Sch Mech & Optoelect Phys, Huainan 232001, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2022年 / 631卷

关键词：

Second-harmonic generation; Quantum dot/quantum ring; Parabolic-inverse squared; Density matrix theory; NONLINEAR-OPTICAL RECTIFICATION; REFRACTIVE-INDEX CHANGES; ABSORPTION-COEFFICIENTS; ELECTRIC-FIELD; IMPURITY; DOTS; SUSCEPTIBILITY; EXCITON; WELLS;

D O I：

10.1016/j.physb.2021.413644

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The simultaneous effects of hydrostatic pressure, temperature and Al-concentration on the second-harmonic generation (SHG) coefficient for GaAs/Ga1-xAlxAs tuned quantum dot/quantum ring (QD/QR) under parabolic inverse squared potential plus the modified Gaussian potential in a perpendicular magnetic field are studied in detail. The analytical expression of the SHG coefficient can be obtained using the density matrix theory and iterative method. The numerical results of GaAs/Ga(1-x)Al(x)A tuned QD/QR are given. The result of calculation illuminates that the applied magnetic field, Al-concentration, hydrostatic pressure, temperature and the harmonic confinement frequency can make an impact on energy level interval, the product of matrix elements, transition frequency and other factors so that the peak value of SHG coefficient and resonance peak changing under the action of these factors. Furthermore, the depth and the radius of the QD have a bearing on the SHG coefficient.

引用

页数：8

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