A theoretical analysis of the radiative current and its dependence on pressure in GaInNAs 1.3 /spl mu/m lasers

Summary form only given. We have shown that it is necessary to introduce a modified 10-band k.p Hamiltonian to describe the band dispersion in GaInN/sub x/As/sub l-x/, adding two spin-degenerate nitrogen states to the conventional 8-band k.p Hamiltonian to account for the band gap reduction and modified conduction band dispersion. We use the modified Hamiltonian here to undertake a theoretical analysis of gain as a function of carrier density and radiative current density in ideal 1.3 /spl mu/m GaInN/sub x/As/sub 1-x//GaAs QW structures. We then use the model to analyse recent experimental data on the variation of threshold current with pressure in a GaInNAs/GaAs laser structure.