Impurity and eccentricity effects on the nonlinear optical rectification in a quantum ring under lateral electric fields

摘要: Within the framework of effective-mass approximation, effect different static perturbations—lateral electric field, impurity donor, and eccentricity distortion—on nonlinear optical rectification in a GaAs disc-shaped quantum ring has been investigated. For concentric ring, influence lateral field off-center impurities on intraband transitions at two values temperature was studied detail. We found that response strongly depends incident light polarization donor position within structure. Compared with profile 4 K, spectra exhibit 77 K additional peaks reduced magnitude low-frequency range. The main transition become smaller, while their positions remain almost unchanged temperature. eccentric structures, relevant differences between small large regimes can be observed electronic properties. In this case, energy optic...