Me. Pistol et D. Gershoni, MODELING OF ELECTROABSORPTION IN SEMICONDUCTOR QUANTUM STRUCTURES WITHIN THE 8-BAND K-CENTER-DOT-P THEORY, Physical review. B, Condensed matter, 50(16), 1994, pp. 11738-11745
We have incorporated electric fields into the eight-band k.p theory, w
hich we have applied to heterostructures, in conjunction with the enve
lope-function approximation. We use the method of Baraff and Gershoni
to implement the electric-field effects in a computer program that cal
culates the optical properties of direct-band-gap heterostructures in
one, two, and three dimensions. Using this method, we calculate the in
terband and intersubband electroabsorption of multiple quantum wells a
s well as the interband electroabsorption in superlattices. We illustr
ate the evolution of the Stark localization of the electron wave funct
ion under the application of an external electric field in superlattic
es. Comparison with experimental data, available in the literature, ex
hibits very good agreement between theory and experiment, with respect
to the spectral shape, the absolute magnitude, and the electric-field
dependence of the absorption.