Surface plasmon-related resonances on deep and asymmetric gold gratings

Abstract

Based on theoretical calculations, the surface plasmonlike resonances on deep and asymmetric gold gratings are reinvestigated and assigned to two classes possessing different characteristic symmetry properties. Reflectivity measurements on deep grating structures with varying depth and asymmetry allow for a detailed study of the influence of these parameters on the lowest-order resonances as well as the experimental observation of a higher-order resonance.

Casimir torque between nanostructured plates

“…This could be particularly true when considering metallic plates. It has indeed been realized that the transition from shallow to deep metallic gratings is accompanied by important optical changes [34]. Starting with weakly bounded surface plasmon resonances defined on shallow gratings, propagating along the corrugations, new families of resonances are accessible on deep gratings which are related to the localization of the electromagnetic field inside the grooves [35].…”

Numerical investigation of the excitation of surface plasmon polariton on a periodic surface nanograting composed of metallic nanowires

“…Not e al so, t hat, owi ng t o t he m irror sy mmetry of t he problem, onl y one plasmon charact erized by symmetric spatial distribution of the amplitude and phase of the electric field with respect to the z axis may be excited at the normal incidence. 25 In the case of s-polarized radiation, the local plasmons are not excited (Fig. 2b).…”

Tuneable coupling of surface plasmon‐polaritons and Mie plasmons on a planar surface of nanoporous metal

“…For our calculations we choose the parameters 7.9 p ω = eV and 90 e ν = meV, which are characteristic for gold [7]. In Fig.…”