Resonance anomalies in the light intensity reflected at silver gratings with dielectric coatings

Abstract

The intensity of p-polarized light specularly reflected at silver gratings with LiF coatings of varying thickness was investigated. The influence of the groove depth of the modulated silver surface and the thickness of the LiF coating on the resonance anomalies in the reflected light intensity was determined experimentally. The characteristic behaviour of these anomalies is explained by the properties of the optical eigen-oscillations (surface plasma oscillations and guided light modes) in the layer system.

Sensitivity enhancement of a grating-based surface plasmon-coupled emission (SPCE) biosensor chip using gold thickness

“…2(a), a series of SPR spectra were calculated as a function of a groove depth at this thickness. The calculated optical properties of SPR spectra were similar to previous reports using a silver surface [17,18]. Differences in the SPR angle and FWHM between gold and silver-based SPR spectra reflect the different dielectric constants of these metals.…”

Grating-coupled surface plasmons at microwave frequencies

“…4,5,7,12,13,20,29 At these frequencies the electromagnetic response of the metallic sample is dependent on both the real and imaginary parts of the dielectric function of the substrate, in addition to the interface profile. However, at microwave wavelengths, all metals behave as near-perfect conduc- FIG.…”

“…In addition to the widening of the SPP resonance, we also expect the momentum of the resonance to increase due to perturbation of the surface away from the planar case. 5,20,[22][23][24] The work of Palmer et al 19 shows such a change in the shape of a resonance, and we believe that work provided the first experimental evidence of the propagation of an electromagnetic surface mode, the SPP, on a near-perfectly conducting surface. It is important to note, however, that the resonance of the mode may only be observed when there is another channel into which energy may be transferred.…”

Impact of surface plasmon polaritons on photorefractive effect in dye doped liquid crystal cells with ZnSe interlayers

“…This blue-end-shifting is of prime importance in plasmonics. Metallic gratings were extensively used in energy coupling between visible radiation and surface plasmon polaritons (SPPs) [21][22][23][24][25], playing key roles in nanophotonics [20,[26][27][28][29][30][31]. To circumvent inherent huge loss in metallic materials, along another line, researchers are actively searching alternative low-loss nonmetal plasmonic materials [32].…”