title: Strong three-dimensional field localization and enhancement on deep sinusoidal gratings with two-dimensional periodicity.
abstract: The study of total light absorption due to excitation of localized surface plasmons on deep metallic crossed gratings having a sinusoidal profile with a two-dimensional periodicity shows a very strong increase in the electric field intensity, reaching 800 times the incident intensity. The region with high intensity is strongly localized at the groove top and is characterized by a volume much smaller than the diffraction limit, both in transverse direction along the grating plane, and in longitudinal direction when going away from the grating surface. The field enhancement and its localization are much more pronounced than in shallow gratings.
authors: Evgeny
authors: E
authors: Popov
authors: Jerome
authors: J
authors: Wenger
authors: John
authors: J
authors: Hoose
authors: Svetlen
authors: S
authors: Tonchev
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation