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Title: Donor impurity states and related terahertz range nonlinear optical response in GaN cylindrical quantum wires: Effects of external electric and magnetic fields

We report a study on the optical absorption coefficient associated to hydrogenic impurity interstate transitions in zinc-blende GaN quantum wires of cylindrical shape taking into account the effects of externally applied static electric and magnetic fields. The electron states emerge within the effective mass approximation, via the exact diagonalization of the donor-impurity Hamiltonian with parabolic confinement and external field effects. The nonlinear optical absorption is calculated using a recently derived expression for the dielectric susceptibility, obtained via a nonperturbative solution of the density-matrix Bloch equation. Our results show that this treatment eliminates not only the intensity-dependent bleaching effect but also the change in sign of the nonlinear contribution due to the combined effect of asymmetric impurity location and the applied electric field.
Authors:
 [1] ;  [2] ;  [3]
  1. Departamento de Ciencias Básicas, Universidad de Medellín, Medellín (Colombia)
  2. Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209 Cuernavaca, Morelos (Mexico)
  3. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín (Colombia)
Publication Date:
OSTI Identifier:
22304211
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; APPROXIMATIONS; ASYMMETRY; BLOCH EQUATIONS; CONFINEMENT; CYLINDRICAL CONFIGURATION; DENSITY MATRIX; DIELECTRIC MATERIALS; EFFECTIVE MASS; ELECTRIC FIELDS; GALLIUM NITRIDES; HAMILTONIANS; HYDROGEN ADDITIONS; IMPURITIES; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; NONLINEAR OPTICS; NONLINEAR PROBLEMS; QUANTUM WIRES; ZINC SULFIDES