Externally generated piezoelectric effect in semiconductor micro- structures

We report a study of the effects of large, external uniaxial stress (T) along [001] and [110] on the optical properties of a strained layer (001) In0.21Ga0.79As/GaAs single quantum well. For T [110] we have observed a red shift of several peaks and an increase in the intensities of several symmetry-forbidden transitions; effects not seen for T [100]. This phenomenon is due to an electric field along [001] induced by the piezoelectric coupling for T [110]. © 1991 The American Physical Society.