Abstract
A dynamical change of material properties induces a special type of reflection and refraction at a temporal discontinuity. Here, we study the interaction of graphene plasmons with single and double temporal discontinuities or shocks, leading to controlled in-plane scattering. We analytically determine the Fresnel-like coefficients for graphene plasmons at these boundaries, and validate our results by rigorous numerical simulations. Temporally controlled doping of two-dimensional materials such as graphene thus leads to a new mechanism for planar and compact plasmonic devices.
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