Related Experiment Video
Updated: Jun 20, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Conditions for the occurrence of k gaps for surface polaritons on gratings
Abstract:
We obtain a formula for the change of the reflectivity from a symmetric metallic grating due to the excitation of surface polaritons. We find that reflectivity measurements at near-normal incidence can show a k gap in the dispersion curves of the surface polaritons even when direct coupling between two polaritons at the zone boundary is present. We discuss the limit in which this can occur and examine the reflectivity surface as the direct coupling is varied. The formula permits a simple discussion of the k gaps at 2npi/a for any n.
More Related Videos
Related Concept Videos
Potential Due to a Polarized Object
Magnetostatic Boundary Conditions
Imperfections in Crystal Structure: Stoichiometric Point Defects
Dielectric Polarization in a Capacitor

