Smooth interface effects on the confinement properties of GaSbrAl Ga Sb quantum wells

A theoretical investigation on the confinement properties of GaSbrAl Ga Sb single quantum wells QWs.with x 1yx smooth interfaces is performed. Error function erf.-like interfacial aluminum molar fraction variations in the QWs, from which it is possible to obtain the carriers effective masses and confinement potential profiles, are assumed. It is shown that the existence of smooth interfaces blue shifts considerably the confined carriers and exciton energies, an effect which is stronger in thin QWs. q2000 Elsevier Science B.V. All rights reserved.