Near-Field Distribution of Optical Transmission of Periodic Subwavelength Holes in a Metal Film
- 5 February 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 86 (6), 1110-1113
- https://doi.org/10.1103/physrevlett.86.1110
Abstract
Optical transmission of a two-dimensional array of subwavelength holes in a metal film has been numerically studied using a differential method. Transmission spectra have been calculated showing a significant increase of the transmission in certain spectral ranges corresponding to the excitation of the surface polariton Bloch waves on a metal surface with a periodic hole structure. Under the enhanced transmission conditions, the near-field distribution of the transmitted light reveals an intensity enhancement greater than 2 orders of magnitude in localized spots resulting from the interference of the surface polaritons Bragg scattered by the holes in an array.
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