Experimental verification of extraordinary transmission without surface plasmons

TitleExperimental verification of extraordinary transmission without surface plasmons
Publication TypeJournal Article
Year of Publication2009
AuthorsMedina-Mena, F., J. A. Ruiz-Cruz, F. Mesa-Ledesma, J. R. Montejo-Garai, J. M. Rebollar, and R. Marques-Sillero
JournalApplied Physics Letters
Date PublishedAugust
Keywordsimpedance matching, light transmission, optical waveguides, periodic structures, polaritons, surface electromagnetic waves, surface plasmons
AbstractThis letter provides an experimental demonstration of extraordinary transmission in a closed waveguide system loaded with an electrically small diaphragm. This is a situation where the standard surface plasmon polariton (SPP) theory does not apply. The theoretical explanation is then based on the concept of impedance matching. This concept has previously been applied by some of the authors to account for enhanced transmission in situations where surface plasmon theory can be used: periodic arrays of small holes or slits in flat metal screens. The experiment in this letter supports the impedance matching model, valid for when SPPs are present or not