Fig. 1. Band structure of SCH laser^[16]

Fig. 2. Band structure of asymmetric waveguide laser^[16]

Fig. 3. Band structures of digital alloy barrier and graded-layer antimonide laser^[23]

Fig. 4. Band structure of graded-index SCH laser^[25]

Fig. 5. Scanning electron microscope (SEM) image of advanced sawtooth waveguide structure^[29]

Fig. 6. Schematic diagram of AlGaInAsSb quinary alloy barrier^[38]

Fig. 7. Band structures of antimonide type-I quantum well cascade laser^[46]

Fig. 8. SEM image of LC-DFB laser with Cr metal grating^[50]

Fig. 9. SEM image of LC-DFB laser with etched grating^[57]

Fig. 10. SEM image of nanoimprinted LC-DFB laser^[62]

Fig. 11. SEM image of LC-DFB laser with metal grating^[65]

Fig. 12. Schematic of high-order grating socketed ridge-waveguide laser^[67]

Fig. 13. Atomic force microscope (AFM)images after 3, 18, and 54 ML AlSb deposition on Si^[71]. (a) 3 layers of AlSb; (b) 18 layers of AlSb; (c) 54 layers of AlSb

Fig. 14. Energy-band diagram of Sb-based laser grown on Si^[77]

Fig. 15. Scanning transmission electron microscope (STEM)image of epitaxial GaSb grown on Si by ART^[83]

Fig. 16. Schematics of silicon-based heteroepitaxy growth process ^[84]