2013 Volume 11 Pages 29-35
Combined effects of electric field and magnetic field on exciton binding energy as a function of dot radius in a cylindrical GaAs0.9P0.1/GaAs0.6P0.4 strained quantum dot is investigated. The strain contribution includes the strong built-in electric field induced by the spontaneous and piezoelectric polarizations. Numerical calculations are performed using variational procedure within the single band effective mass approximation. The interband emission energy as functions of geometrical confinement, electric and magnetic field strengths in the quantum dot is discussed. The diamagnetic shift of exciton as a function of dot radius is found. The quantum confined Stark shifts of exciton for various dot radii are discussed. Optical rectification in the GaAs0.9P0.1/GaAs0.6P0.4 strained quantum dot is computed in the presence of electric and magnetic field strengths. Our results show that the optical rectification strongly depends on the spatial confinement, electric field and magnetic field strength. [DOI: 10.1380/ejssnt.2013.29]
