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Título : Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring : effects of applied electric field and hydrostatic pressure
Autor : Barseghyan, Manuk G.
Restrepo Arango, Ricardo León
Mora Ramos, Miguel Eduardo
Duque Echeverri, Carlos Alberto
Palabras clave : Anillo cuántico
GaAs
Absorción de ondas electromagnéticas
Electromagnetic wave absorption
Absorción óptica
Fecha de publicación : 2012
Citación : Barseghyan, M. G., Restrepo Arango, R. L., Mora Ramos, M. E., & Duque Echeverri, C. A. (2012). Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: effects of applied electric field and hydrostatic pressure. Nanoscale Research Letters , 7(1), 538-545. DOI:10.1186/1556-276X-7-538
Abstract : The linear and nonlinear intraband optical absorption coefficients in GaAs three-dimensional single quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and electric field, applied along the growth direction of the heterostructure, the energies of the ground and first excited states of a donor impurity have been found using the effective mass approximation and a variational method. The energies of these states are examined as functions of the dimensions of the structure, electric field, and hydrostatic pressure. We have also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as a function of incident photon energy for several configurations of the system. It is found that the variation of distinct sizes of the structure leads to either a redshift and/or a blueshift of the resonant peaks of the intraband optical spectrum. In Maddition, we have found that the application of an electric field leads to a redshift, whereas the influence of hydrostatic pressure leads to a blueshift (in the case of on-ring-center donor impurity position) of the resonant peaks of the intraband optical spectrum.
Grupo de INV. : Grupo de Materia Condensada-UdeA
URI : http://hdl.handle.net/10495/8374
ISSN : 1556276
19317573 E
Aparece en las colecciones: CIEN (Centro de Investigaciones en Ciencias Exactas y Naturales)

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