Optical nonlinearities associated to applied electric fields in parabolic two-dimensional quantum rings

• Published in: Journal of luminescence 2013-11, Vol.143, p.81-88
• Main Authors: Duque, C.M., Morales, A.L., Mora-Ramos, M.E., Duque, C.A.
• Format: Article
• Language: English
• Subjects: Applied electric field; Applied magnetic field; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conduction band; Confining; Cross-disciplinary physics: materials science; rheology; Disks; Electric fields; Exact sciences and technology; Exact solutions; Materials science; Mathematical analysis; Nanoscale materials and structures: fabrication and characterization; Nonlinear optical properties; Nonlinearity; Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Quantum dot; Quantum dots; Two dimensional
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2013.04.039

The linear and nonlinear optical absorption as well as the linear and nonlinear corrections to the refractive index are calculated in a disc shaped quantum dot under the effect of an external magnetic field and 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 effect of a static applied electric field. In general terms, 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. •Optical absorption and corrections to the refractive in quantum dots.•Electric and magnetic field and parabolic and inverse square potentials.•Perturbation-theory treatment of the effect of the electric field.•Induced blueshifts or redshifts of the resonant peaks are studied.•Evolution of rates of change for amplitudes of resonant peaks.