Nonlinear Optical Rectification and Second Harmonic Generation in 2D Quantum Rings under Electric Field and Magnetic Fields

A.L. Moralesa, M.E. Mora-Ramosa,b,c and C.A. Duquea aGrupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia bFacultad de Ciencias, Universidad Autónoma del Estado de Morelos, Cuernavaca, México cFísica Teórica y Aplicada, Escuela de Ingeniería de Antioquia, Envigado, Antioquia, Colombia

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By using the effective mass and parabolic band approximations, the nonlinear optical rectification and the second harmonic generation are calculated in a two-dimensional quantum ring under the simultaneous effects of perpendicularly applied magnetic field and in-plane applied electric field. The geometry of the ring is modeled via the combined influences of a parabolic and inverse square confining potentials. The exact solutions for the two-dimensional motion of the conduction band electrons are used as the basis for a perturbation-theory treatment of the static electric field effect. The variation of one of the different potential energy parameters, for a fixed configuration of the remaining ones, leads to either blueshifts or redshifts of the resonant peaks as well as to distinct rates of change for their amplitudes.

DOI: 10.12693/APhysPolA.125.195 PACS numbers: 42.65.-k, 73.21.-b, 78.67.-n