26 August 2005 Strong optical coupling effects through a continuous metal film with a surface dielectric grating
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Abstract
We have observed experimentally the anomalously large light transmission through a continuous gold film with various PMMA surface dielectric gratings deposited on top of the film. The spectra of these samples have been measured for different incident and scattered angles. Enhanced transmission through the film is attributed to the excitation of various surface plasmon modes. Both symmetrical and anti-symmetrical surface plasmon dispersion relations have been applied to analyze the transmission spectrum. Similar anomalous transmission effects have been observed in light transmission through gold-chalcogenide glass (As2S3) interfaces after grating formation in the chalcogenide glass using two-beam interference with strong pump light. Enhanced transmission is demonstrated using a weak probe beam. These observations demonstrate the possibility of all-optical signal processing using enhanced anomalous light transmission through metal films.
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Yu-Ju Hung, Igor I. Smolyaninov, Quirino Balzano, Christopher C. Davis, "Strong optical coupling effects through a continuous metal film with a surface dielectric grating", Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 59271Y (26 August 2005); doi: 10.1117/12.617712; https://doi.org/10.1117/12.617712
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