Open AccessResonant transmission through a metallic film due to coupled modes
Author(s) -
François Marquier,
JeanJacques Greffet,
S. Collin,
Fabrice Pardo,
Jean-Luc Pélouard
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.000070
Subject(s) - optics , surface plasmon polariton , surface plasmon , materials science , absorption (acoustics) , transmission (telecommunications) , dispersion (optics) , coupling (piping) , extraordinary optical transmission , coupled mode theory , transmission coefficient , plasmon , attenuation coefficient , polariton , dispersion relation , physics , refractive index , telecommunications , computer science , metallurgy
Enhanced transmission and absorption by a silver film with a periodic array of slits has been studied numerically. We find that transmission and absorption peaks coincide and can be attributed to resonances of the structure. We show that these modes can be viewed as a coupling between cavity modes and surface plasmon polaritons. A quantitative analysis shows that the coupled mode can have a cavity mode character or a surface plasmon character depending on the distance to the crossing point of their dispersion relation. Finally, we provide a simple model for the peak transmission value by introducing the concept of radiative yield.