Optically and electrically tunable Dirac points and Zitterbewegung in graphene-based photonic superlattices
Optically and electrically tunable Dirac points and Zitterbewegung in graphene-based photonic superlattices
We demonstrate that graphene-based photonic superlattices provide a versatile platform for electrical and all-optical control of photonic beams with deep-subwavelength accuracy. Specifically, by inserting graphene sheets into periodic metallodielectric structures, one can design optical superlattices that possess photonic Dirac points (DPs) at frequencies at which the spatial average of the …