In this chapter, a review of the reported approaches to achieve an injection silicon laser is presented. After an initial discussion of the basics on light amplification and gain in semiconductor, we consider the limitations of silicon, in particular its band structure. A short introduction to the first optically pumped silicon laser is given. Then the various approaches to get an injection silicon laser are presented and evaluated: bulk silicon, silicon nanocrystals, and Er-coupled silicon nanocrystals.
Pavesi, L. (2006). Optical gain in silicon and the quest for a silicon injection laser. Springer Series in Optical Sciences, 119. https://doi.org/10.1007/978-3-540-28912-8_2