Article ID Journal Published Year Pages File Type
10642303 Physica E: Low-dimensional Systems and Nanostructures 2005 8 Pages PDF
Abstract
Optical absorption in GaAs parabolic quantum well in the presence of hydrogenic impurity is considered. The absorption coefficient associated with the transitions between the upper valence subband and donor ground state is calculated. The impurity ground state wave function and energy are obtained using the variational method. Dependence of the absorption spectra on impurity position in quantum well was investigated. It is shown, that along with quantum well width decrease the absorption threshold shifts to higher frequencies. Results obtained within frames of parabolic approximation are compared with results for rectangular infinite-barrier quantum well case. The acceptor state → conduction band transitions considered as well.
Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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