Abstract

In this paper the combined effect of intense terahertz laser radiation and external homogeneous magnetic field on electron states and magnetization of GaAs quantum ring is investigated theoretically. The effect of laser field is calculated using the dipole approximation and Kramers–Henneberger unitary transformation. The temperature effect on magnetization of the system is also considered. It is shown that with the increase of laser field parameter the unusual Aharonov–Bohm oscillations can be observed in the ring. For constant values of magnetic field, the magnetization can be as increasing, as well as decreasing function of temperature. There are some resonant values of magnetic field, for which the magnetization of the ring remains almost constant with the increase of temperature.

中文翻译：

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强太赫兹激光辐射对半导体量子环磁化的影响

摘要

本文从理论上研究了强太赫兹激光辐射和外部均匀磁场对GaAs量子环电子态和磁化强度的综合影响。使用偶极子近似和 Kramers-Henneberger 酉变换计算激光场的影响。还考虑了温度对系统磁化强度的影响。结果表明，随着激光场参数的增加，可以在环中观察到异常的 Aharonov-Bohm 振荡。对于恒定的磁场值，磁化强度可以是温度的增减函数。有一些磁场的共振值，随着温度的升高，环的磁化强度几乎保持不变。