量子点中两耦合时间矢量光孤子的碰撞特性  

Collision Characteristics of Two Coupled Temporal Vector Optical Solitons in Quantum Dot

作　　者：罗婷婷[1] 王登龙[1] 佘彦超[2] 丁建文[1] 肖思国[1] 

机构地区：[1]湘潭大学物理系,湖南湘潭411105 [2]铜仁学院物理与电子科学系,贵州铜仁554300

出　　处：《光学学报》2016年第2期221-229,共9页Acta Optica Sinica

基　　金：国家自然科学基金(51372214;11374252;11474245)

摘　　要：构建一个由一束弱线性偏振探测光场在与其平行的磁场作用下形成的两正交偏振分量,联合两束强耦合控制光场与半导体单量子点相互作用所形成的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,解析地研究了该半导体量子点电磁感应透明介质中的两耦合时间矢量光孤子的稳定性及其碰撞特性。结果发现,该体系中两耦合时间矢量光孤子的碰撞特性与其初始相位差有关;当两孤子分量为同相或反相时,孤子间会呈现出近弹性碰撞且无能量转移;而当孤子分量间初始相位差为π2时,两孤子则会在融合之后再彼此分离且出现能量转移。A theory model of the four-level type semiconductor quantum dot system under the mechanism of electromagnetically induced transparency （EIT） is proposed. The model is composed of a semiconductor quantum dot （SQD） system interacting with a weak, linear-polarized probe field with two orthogonally polarized components under the applied longitudinal magnetic field and two strong coupling control fields. By using the multiple-scale method, the stability and collision dynamical characteristics of two coupled temporal vector optical solitons in the semiconductor quantum dot media are analytically investigated. It is shown that the collision properties of two coupled temporal vector optical solitons are correlated with their initial phase shift. Especially, when two solitons components are in phase or out of phase, the collisions between them are almost elastic without energy transfer. While the initial phase shift is π/2, they will be separated from each other after their collision and there is energy transfer between two solitons.

关 键 词：量子光学 半导体量子点 电磁感应透明 时间矢量光孤子 

分 类 号：O431[机械工程—光学工程] O437[理学—光学]