Lasing characteristics of low threshold ZnSe-based blue/green laser diodes grown on conductive ZnSe substrates

Room temperature continuous wave operation of ZnSe-based blue/green laser diodes grown homoepitaxially on conductive ZnSe substrates with threshold current densities as low as $\text{176\hspace{0.17em}}{\mathrm{A/cm}}^{\mathrm{2}}$ has been demonstrated. This is the lowest reported threshold among all short wavelength lasers in the blue/green region. Lifetimes at room temperature of up to 2.1 h have been obtained for lasers with pre-existing defect densities lower than ${\text{3×10}}^4\hspace{0.17em}{\mathrm{cm}}^{\mathrm{-2}}.$