A theoretical study of the dynamical behavior of SQW GaAs AlGaAs laser

Abstract EN

In this work, the peak modal gain and the radiative and Nonradiative current densities for Single Quantum Well (SQW) GaAs / AlGaAs laser are studied theoretically with varying the well widths Lz = (200, 150, 100, and 75) Ǻ, at a bandgap discontinuity ΔEc of 0.1 eV, it was found that the highest value of the peak modal gain gmax = 400 cm-1 is achieved at Lz = 75 Ǻ, and the lower value to achieve transparency Ntr = 0.5×1018 cm-3 at Lz = 200 Ǻ The optimum value for QW width to achieve the lower threshold current density Jth = 481.5 A / cm2 at the same injected carrier density is Lz = 100 Ǻ.