Absorption coefficients for interband optical transitions in a strained InAs1−xPx/InP quantum wire

Abstract

Excitons confined in an InAs1−xPx/InP (x=0.2) quantum well wire are studied in the presence of magnetic field strength. Numerical calculations are carried out using variational approach within the single band effective mass approximation. The compressive strain contribution to the confinement potential is included throughout the calculations. The energy difference of the ground and the first excited state is investigated in the influence of magnetic field strength taking into account the geometrical confinement effect. The magnetic field induced optical band as a function of wire radius is investigated in the InAs0.8P0.2/InP quantum well wire. The valence-band anisotropy is included in our theoretical model by employing different hole masses in different spatial directions. The optical gain as a function of incident photon energy is computed in the presence of magnetic field strength. The corresponding 1.55μm wavelength is achieved for 40Å InAs0.8P0.2/InP quantum well wire. We hope that the results could be used for the potential applications in fiber optic communications.