Abstract
Using a rigorous electromagnetic analysis of two-dimensional (or crossed) gratings, we account, in a first step, for the enhanced transmission of a sub-wavelength hole array pierced inside a metallic film, when plasmons are simultaneously excited at both interfaces of the film. Replacing the hole array by a continuous metallic film, we then show that resonant extraordinary transmission can still occur, provided the film is modulated. The modulation may be produced in both a one-dimensional and a two dimensional geometry either by periodic surface deformation or by adding an array of high index pillars. Transmittivity higher than 80% is found when surface plasmons are excited at both interfaces, in a symmetric configuration.
©2003 Optical Society of America
Full Article | PDF ArticleMore Like This
L. Martín-Moreno and F. J. García-Vidal
Opt. Express 12(16) 3619-3628 (2004)
Je Hong Kim and Patrick J. Moyer
Opt. Express 14(15) 6595-6603 (2006)
Wen-Di Li, Jonathan Hu, and Stephen Y. Chou
Opt. Express 19(21) 21098-21108 (2011)