Journal
OPTICS LETTERS
Volume 26, Issue 24, Pages 1972-1974Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.26.001972
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The optical transmission through a subwavelength aperture in a metal film is strongly enhanced when the incident light is resonant with surface plasmons at the corrugated metal surface surrounding the aperture. Conversely, the aperture acts as a novel probe of the surface plasmons, yielding useful insights for optimizing the transmission enhancement. For the optimal corrugation geometry, a set of concentric circular grooves, three times more light is transmitted through the central subwavelength aperture than directly impinges upon it. This effect is useful in the fabrication of near-field optical devices with extremely high optical throughput. (C) 2001 Optical Society of America.
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