倾斜磁场中各向异性抛物量子盘的光吸收特性  

Optical Absorption of an Asymmetric Parabolic Quantum Disks in Tilted Magnetic Fields

作　　者：牛牧文 李学超 叶纯宝 高娟 NIU Mu-wen;LI Xue-chao;YE Chun-bao;GAO Juan(School of Mechanics and Optoelectronics Physics,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001

出　　处：《安徽师范大学学报（自然科学版）》2020年第2期134-138,共5页Journal of Anhui Normal University(Natural Science)

基　　金：国家自然科学基金项目(51702003);安徽省自然科学基金项目(1508085QF140,1808085ME130);高校优秀青年人才支持计划基金项目(gxyqZD2018039);高校优秀青年骨干人才国内外访学研修项目(gxgwfx2019016)。

摘　　要：从理论上研究了倾斜磁场中具有各向异性抛物量子盘的光吸收特性。利用有效质量近似,通过求解量子盘的哈密顿量,得到了量子盘的能级,通过使用密度矩阵理论和迭代法,给出了系统的总光吸收系数。结果表明系统沿x方向上受限势频率ωx、参数η以及磁场倾角θ的变化均会对量子盘的光吸收系数产生明显影响。此外,在一定范围内当受限势频率ωx、磁场倾角θ增大时,总光吸收系数的共振峰位置会向入射光子能量高的区域移动。The optical absorption coefficient(OAC)of anisotropic parabolic quantum disks in the presence of tilted magnetic fields is investigated theoretically.By solving the Hamiltonian of the quantum disk under the effective-mass approximation,the energy eigenvalues of the quantum disk is obtained.Then the total OAC is calculated by using the density-matrix approach and iterative method.According to the results obtained from the quantum disks show that the confined potential frequency in the horizontal direction,the transformation parameter and tilt angle of magnetic field all have a great influence on the optical absorption coefficient of an anisotropic parabolic quantum disk.In addition,when the confined potential frequency along the horizontal direction or the tilt angle of magnetic field changes,the resonance peak position of the total OAC has a blue-shift.

关 键 词：倾斜磁场 各向异性 量子盘 光吸收 

分 类 号：O431.2[机械工程—光学工程]