Demonstration of a grating-surface-emitting diode laser with low-threshold current density

This letter reports the demonstration of grating-surface-emitting (GSE) lasers with threshold current densities as low as 440 A/cm2. When the distributed-Bragg-reflector sections were cleaved from these lasers, the resulting edge-emitting lasers had threshold current densities that were essentially unchanged from that of the GSE laser. However, the operating wavelength of the Fabry–Perot laser was typically 70 Å shorter than that of the surface emitter.