Electric field effect for eigen states in In0.53Ga0.47As/In0.52Al0.48As multi-quantum wells using photocurrent spectroscopy

Photocurrents in lattice matched In_0.53Ga_0.47As/In_0.52Al_0.48As multi-quantum well structures were measured at room temperature. Steplike structures accentuated by the exciton peaks of interband transitions were observed on photocurrent spectra of the multi-quantum wells structures. The calculated transition energies agreed with the experimental´s on the quantum confined Stark effect. About 5 nm and 9.4 nm quantum wells, the mixing between the valence subbands of the light hole and the heavy hole was observed in the electric field.