盘形量子点在磁场中的线性及非线性折射率改变(英文)  

Linear and nonlinear refractive index changes in a disk-shaped quantum dot with applied magnetic field

作　　者：郭康贤[1] 刘光辉[1] 

机构地区：[1]广州大学物理与电子工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2013年第1期27-35,共9页Journal of Guangzhou University:Natural Science Edition

基　　金：Supported by Guangdong Provincial Science and Technology Project(2012A080304010);Guangdong Provincial Natural Science Foundation(S2012010010115)

摘　　要：在外加磁场中,受限势为抛物势加反平方势的条件下,理论上研究了线性及非线性折射率的变化.利用密度矩阵理论和迭代法得到了线性及非线性折射率变化的表达式.研究结果表明,线性及非线性折射率的变化受到磁场、反平方势的外场强度β、抛物势受限频率和入射光强的强烈影响.Linear and nonlinear refractive index changes in a disk-shaped quantum dot （DSQD） with parabolic potential plus an inverse squared potential in the presence of a static magnetic field are theoretically investiga- ted. The analytical expressions for the refractive index changes are obtained by using the compact-density-matrix approach and iterative method. It is found that the refractive index changes are strongly affected not only by the static magnetic field, but also by the strength of external field 13 of inverse squared potential, the parabolic con- finement frequency tOo and the incident optical intensity I.

关 键 词：量子点 折射率 磁场 

分 类 号：O471[理学—半导体物理]