Laser field and electric field effects on exciton states and optical properties in zinc-blende GaN/AlGaN quantum well

Abstract

Based on the effective mass approximation, the combined effects of the laser field and electric field on exciton states and optical properties in the zinc-blende GaN/AlGaN quantum well (QW) are investigated by means of a variational method. Numerical results show that when the applied electric field is weak, the laser field reduces the exciton binding energy and oscillator strength in the QW; however, when the applied electric field is strong, the exciton binding energy and oscillator strength have a maximum with the variation of the laser field. Moreover, the laser field increases the interband transition energy and the energy position of the linear optical susceptibility peak.