Pressure effect inducing a larger 1D character in high index (311)A oriented quantum wells

The optical properties of AlGaAs/GaAs (311)A and (100) oriented quantum wel ls are investigated by photoluminescence under high hydrostatic pressure at room temperature. Based on the hydro static character of our experiment an d making use of the fact that the energy shift per unit pressure can be con verted as the energy shift per fractional volume change we correlate the ex perimental blue shift energy of both (311)A and (100) structures with a vol umetric strain induced by pressure. The gradual enhancement of luminescence intensity with pressure, observed only for a (311)A oriented quantum well, is correlated to an enhancement in the 1D character of the channels in thi s structure, which are characterized by a periodic corrugation pattern alon g [-2,3,3] on that surface.