A schematic image of DFB Si laser; Inset: photograph of a fabricated DFB device. (b) Emission spectra of the Si laser as a function of pump power; Background: a cross-sectional SEM image of the DFB structure.
Integrated Si photonics incorporates the essence of the two pillar industries of “microelectronics” and “optoelectronics”, which is expected to bring new technological revolution in a variety of fields such as communication, sensing, lighting, display, imaging, detection, etc. Si lasers are the key to achieve integrated Si photonics. However, the optical gains of Si are lower than those of III-V compound semiconductors by one order of magnitude or two, due to its indirect bandgap feature...
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