Electric field effect for eigen states in In/sub 0.53/Ga/sub 0.47/As/In/sub 0.52/Al/sub 0.48/As multi-quantum wells using photocurrent spectroscopy

Photocurrents in lattice matched In/sub 0.53/Ga/sub 0.47/As/In/sub 0.52/Al/sub 0.48/As 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.