Optical communications waveband lasing from Sb-based quantum dot vertical-cavity laser

Antimonide-based quantum dot (Sb-based QD) vertical-cavity surface-emitting lasers (VCSELs) were developed to operate in the 1.3- and 1.55-μm optical communications wavebands. The Sb-based QD–VCSELs, which contain high-density InGaSb QDs that are Sb-based material, were fabricated on (0 0 1)-oriented GaAs substrates. The high-density InGaSb QDs, used an active media, were created by using a useful method of a silicon atom irradiation. The Sb-based QD–VCSELs in continuous wave operation at room temperature under optically pumped conditions emitted long wavelengths at 1.25 and 1.55 μm with a low-threshold power.