Theory of grating-coupled excitation of Dyakonov surface waves

Grating-coupled excitation of high-phase-speed Dyakonov surface waves

“…An absorptance peak whose angular location is independent of L u beyond a threshold value when L g > 0 may indicate the excitation of a Dyakonov surface wave. In order to confirm, that angular location has to be compared to the angular locations predicted by the solutions of the canonical boundary-value problem; confirmation requires a reasonable match [17,26,30].…”

“…The surface wave that are guided by an interface of two homogeneous dielectric mediums of which at least one is anisotropic are commonly called Dyakonov surface waves [10][11][12][13][14][15][16][17], although there are antecedent works by others [9,18]. An anisotropic dielectric medium may be either uniaxial [9,10], biaxial [15][16][17], or gyrotropic [19,20].…”

Morphological effects on the excitation of surface waves in the grating-coupled configuration

“…The grating is assumed to have sinusoidal bumps of width L 1 ∈ (0, L] along the x axis and depth L g along the z axis. 38,39 When the isotropic material with relative permittivity ε s is a dielectric material, surface waves are called Dyakonov surface waves. When that material is a metal, surface waves are called SPP waves.…”

“…Therefore, we examined the absorptances of p-and s-polarized light for a CTF grown on a one-dimensional grating with all three planes distinct from each other. 38,39 The absorptances were computed as functions of the direction of incidence, and the excitation of surface waves was studied for various orientations of the three planes. The grating could be made of either a metal 38 or an isotropic dielectric material.…”

“…The grating could be made of either a metal 38 or an isotropic dielectric material. 39 The plan of this paper is as follows: The boundary-value problem for the grating-coupled configuration is briefly discussed in Sec. 2.…”