'Institute of Electrical and Electronics Engineers (IEEE)'
Abstract
The threshold current density of semiconductor lasers has seen a rapid and considerable reduction in recent years. The progress however, appeared to slow down giving rise to speculations that perhaps the fundamental limits were being approached. It is always however, very delicate to separate bottlenecks associated with the technology from the fundamental properties particularly during the development phase. In this paper, we show that threshold current densities as low as 80 A/cm^2 can be obtained in optimized graded refractive index AlGaAs/GaAs lasers with quantum well thicknesses of about 100 Å
