Optical Conductivity of Anisotropic Quantum Dots in Magnetic Fields

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（1）
• 页码范围: 191-194
• 页数: 4页
• 语种: 英文

摘要

Optical conductivity of anisotropic double-parabolic quantum dots is investigated with the memory-function approach, and the analytic expression for the optical conductivity is derived. With characteristic parameterspertaining to GaAs, the numerical results are presented. It is shown that: (1) the larger the optical phonon frequency ωLO, the stronger the peak intensity of the optical conductivity, and the more asymmetric the shape of the optical conductivity; (2) the magnetic field enhances the optical conductivity for levels l = 0 and l = 1, with or without electron-LO-phonon interactions; (3) the larger the quantum dot thickness lz, the smaller the optical conductivity σ(ω).