Photoluminescence energy transitions in GaAs-Ga_(1-x)Al_xAs double quantum wells: Electric and magnetic fields and hydrostatic pressure effects

摘要

The photoluminescence energy transitions in GaAs-Ga_(1-x)Al_xAs coupled double quantum wells are presented by considering the simultaneous effects of applied electric and magnetic fields and hydrostatic pressure. Calculations have been made in the framework of the effective mass and parabolic band approximations and using a variational procedure. The electric field is taken to be oriented along the growth direction of the heterostructure whereas for the magnetic field both in-plane and in-growth directions have been considered. The results show that the hydrostatic pressure and the applied electric field are two useful tools to tune the direct and indirect exciton transitions in such heterostructures. Our results are in good agreement with previous experimental findings in double quantum wells under applied electric field and hydrostatic pressure.