Room-temperature CW operation of GaSb laser diodes grown on on-axis (001) Si substrates (Conference Presentation)

The monolithic integration of III-V semiconductors on on-axis silicon is currently under active consideration. In this work we propose a novel epitaxial procedure to grow high quality, anti-phase boundary free GaSb layers on on-axis Si. Broad-area laser diodes based on AlGaAsSb/GaInAsSb QWs exhibit threshold current densities lower than 1 kA.cm-2 whereas narrow-ridge lasers operate cw above room temperature. Our results open the way to the epitaxial integration of a variety of IR lasers on on-axis Si.