Optical conductivity of anisotropic quantum dots in magnetic fields

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 parameters pertaining to GaAs, the numerical results are presented. It. is shown that: (1) the larger the optical phonon frequency omega(LO), 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 l(z), the smaller the, optical conductivity sigma(omega).