Identification of H-type resonances on a flat graphene strip grating in a dielectric slab

摘要

We considered the scattering and absorption of the H-polarized plane wave by an infinite flat graphene-strip grating in a dielectric slab, in the THz range. Accurate numerical treatment was based on the singular integral equation (IE) and projection to orthogonal polynomials. The resulting numerical algorithm possesses guaranteed convergence and controlled accuracy of computations including the vicinities of sharp resonances. Reflectance, transmittance, and absorbance by the graphene-strip grating were studied. The resonances on the surface-plasmon modes, grating modes, and slab modes were identified.