Diffraction gratings 2 Vectors 2 Band gaps 1 Boundary value problems 1 Dielectric materials 1 Diffusers (optical) 1 Dispersion relation 1 Electromagnetic wave diffraction 1 Grating 1 Maxwell equations 1 Metallic gratings 1 Negative phase velocity 1 Nonspecular diffraction 1 Numerical techniques 1 Phase velocity 1 Polarization 1 Refractive index 1 Rough surfaces 1 Roughness 1 Scattering 1 Scattering parameters 1 Specular diffraction 1 Surface plasmon resonance 1 Surface plasmons 1 Surface plasmons (SP) 1 Surface roughness 1 Surface waves 1