Journal
OPTICS EXPRESS
Volume 17, Issue 9, Pages 6920-6930Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.006920
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- French Agence Nationale de la Recherche [ANR 06-BLAN-0275]
- Agence Nationale de la Recherche (ANR) [ANR-06-BLAN-0275] Funding Source: Agence Nationale de la Recherche (ANR)
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The phenomenon of extraordinary transmission in the optical regime for circular hole arrays in optically thick metal films is studied as a function of hole size and depth. In the limit of small holes compared to the depth, the transmission properties follow a waveguide type behavior. By describing the transmission process as resulting from the interference between a resonant and a non-resonant contribution, a transition is clearly revealed through the specific spectral variations of the resonance at a given hole depth. This transition is associated to a change in the attenuation through the hole as its size increases, and corresponds to the optimal condition for surface plasmon excitation. (C) 2009 Optical Society of America
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