| 摘要 |
<p>The invention concerns a method for exciting a sub-wavelength inclusion structure, comprising the step of: providing a first medium having a first refractive index n i and a second medium having a second refractive index nt, wherein n i > n t, wherein the sub-wavelength inclusion structure is arranged at a boundary between the first and second media, wherein the sub- wavelength inclusion structure exhibits polarizability properties; and directing light through the first medium towards the sub-wavelength inclusion structure. The invention is characterized in that the angle of the incident light to the normal of the boundary, thetai, is such that it, for a given set of: frequency of the light omega; surface density of inclusions p; average polarizability a of the inclusion structure at the frequency omega; first refractive index n,; and second refractive index nt, fulfils at least one of the following relations: for s-polarized light: and/or for p-polarized light: where c is the speed of light in vacuum, where / is the imaginary unit, and where thetat is the light propagation angle in the second medium determined by the law of refraction: ntsin0t = n,sin0i.</p> |
