The interaction of light and graphene: Basics, devices and applications

Summary form only given. Graphene interacts with light strongly in a broad wavelength range from sub-terahertz to ultraviolet. Moreover, such interaction can be adjusted by an electric field, making graphene suitable for a variety of tunable photonic applications. In this talk, the author first address the physics of light-graphene interaction within the single-electron framework in wafer-scale CVD graphene whose physical dimension is much larger than the excitation light wavelength. In this case, intraband transitions dominate in terahertz and far-infrared, while interband transitions lead to a constant absorption of around 2% in near-infrared and visible. The mechanism of photodetection, high speed photodetectors, and optical modulators are presented.