To rule out any plasmonic contribution, we calculated the modulus of the electric field () via full-wave finite element method-based simulations (COMSOL Multiphysics), finding that these modes hold ...

For the finite element modeling we use COMSOL Multiphysics (Version 5.5) and assume the following material parameters for monolayer graphene: Young’s modulus E2D = 1.0 TPa, (38) Poisson’s ratio of v = ...