The silicon photonics platform is the realization of photonic integrated circuits compatible with the CMOS process and it useful for reducing costs and energy consumption of optical transceivers used in optical interconnect, while maintaining high communication speed and the amount of data traffic. A benefit of using silicon is that it allows on-chip integration with active devices such as transistors and photodiodes and take advantage of the well established CMOS technology. In recent years, industries have been focusing on this platform, in fact various passive optical devices have been successfully integrated, but an efficient laser source integrated on silicon wafers is still missing, because silicon is an indirect band-gap material and therefore spontaneous and stimulated light emission is difficult to obtain.