期刊
OPTICS COMMUNICATIONS
卷 281, 期 21, 页码 5467-5471出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2008.07.077
关键词
Extraordinary optical transmission; Subwavelength hole array; Coupled-wave theory; Surface plasmon wave
类别
资金
- National Natural Science Foundation of China [10474064]
- Science and Technology Committee of Shanghai Municipal [05ZR14078]
- Program for New Century Excellent Talents in University of China
We present a new explanation of the extraordinary optical transmission through subwavelength hole array in metal films. By using the classical coupled-wave theory, we analyzed the coupling process between light and the surface plasmons wave on metal films with hole array. The analysis shows clearly the physical mechanism of extraordinary optical transmission. The calculation demonstrates that, instead of energy flux directly passing through the holes, the electromagnetic modes could exchange energy by overlapping the evanescent fields under the assistance of hole array. The periodicity of the array provides the momentum-matching condition to present the transmission peaks. The theory exhibits a good agreement with the experimental results reported in every detail. (C) 2008 Elsevier B.V. All rights reserved.
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