利用声子辅助跃迁调控半导体量子点电磁感应透明的光存储  

Controlling Optical Storage in Semiconductor Quantum Dot Electromagnetically Induced Transparency by Phonon-Assisted Transition

作　　者：黎方名 王登龙[1] 佘彦超[2] 丁建文[1] 肖思国[1] 

机构地区：[1]湘潭大学物理与光电工程学院,湖南湘潭411105 [2]铜仁学院物理与电子工程学院,贵州铜仁554300

出　　处：《激光与光电子学进展》2017年第8期302-309,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51372214;11374252;11474245);贵州省教育厅自然科学研究项目[KY(2015)384;KY(2015)446]

摘　　要：基于当前的实验条件,在半导体量子点中考虑声子辅助跃迁效应去构建环形四能级半导体量子点电磁感应透明介质模型。利用多重尺度法解析地研究了其中的时间光孤子的动力学行为。结果发现,可以通过调整声子辅助跃迁强度来控制时间光孤子的幅度、宽度和群速度等动力学性质。时间光孤子的群速度远小于光速,且随着声子辅助跃迁强度的增加,孤子的群速度不断减小,以至于可能缓变接近于零从而出现停滞现象。光停滞有利于将光存储于量子器件内,这为半导体量子器件实现光存储提供一定的参考价值。Based on the current experimental conditions, a model of annular four-level semiconductor quantum dot electromagnetically induced transparency medium is constructed by considering the phonon assisted transition effect in semiconductor quantum dot. Dynamical behaviors of the temporal optical soliton in this system is analytically studied by using multiple-scale method. The results show that dynamical properties such as amplitude, width and group velocity of the temporal optical soliton can be controlled by adjusting the strength of the phonon-assisted transition. The group velocity of the temporal optical soliton is much smaller than the velocity of light. And when the strength of the phonon-assisted transition increases, the group velocity of the soliton decreases continuously. So, the group velocity may slowly close to zero that it appears stagnation. The optical stagnation is helpful for light storing in quantum devices. It provides some reference values to realize optical storage in the semiconductor quantum devices.

关 键 词：量子光学 声子辅助跃迁 电磁感应透明 时间光孤子 半导体量子点 

分 类 号：O431.2[机械工程—光学工程]