Temperature-dependent large signal modulation and Auger recombination in In/sub 0.4/Ga/sub 0.6/As quantum-dot lasers

Reports, to the best of the authors´ knowledge, the first experimental determination of the Auger coefficients in quantum dots. In/sub 0.4/Ga/sub 0.6/As/GaAs self-organized quantum dot separate confinement heterostructure (SCH) lasers were grown by MBE. The active region consists of five coupled quantum dot layers. Single-mode ridge waveguide lasers with ridge widths 3/spl mu/m, 5/spl mu/m, and 8/spl mu/m and length 600/spl mu/m were fabricated by standard photolithographic techniques and cleaving of the facets. The peak lasing wavelength was measured to be 1.06/spl mu/m at room temperature, confirming lasing from ground state transitions. The lowest measured threshold current was 15 mA.