Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring : effects of applied electric field and hydrostatic pressure
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 o...
- Autores:
-
Duque Echeverri, Carlos Alberto
Morales Aramburo, Álvaro Luis
Montes Barahona, Augusto León
Barseghyan, Manuk G.
Restrepo Arango, Ricardo León
Mora Ramos, Miguel Eduardo
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2012
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/8374
- Acceso en línea:
- http://hdl.handle.net/10495/8374
- Palabra clave:
- Espectros de absorción
Absorption spectra
Absorción de ondas electromagnéticas
Electromagnetic wave absorption
Campo eléctrico
Electric field
http://aims.fao.org/aos/agrovoc/c_33981
http://aims.fao.org/aos/agrovoc/c_33981
- Rights
- openAccess
- License
- Atribución 2.5 Colombia (CC BY 2.5 CO)
Summary: | 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. |
---|