期刊
OPTICS COMMUNICATIONS
卷 225, 期 4-6, 页码 331-336出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2003.07.037
关键词
surface plasmons; 2D subwavelength hole array gratings; Fano analysis
类别
We present a unifying point of view which allows to understand spectral features reported in recent experiments with two-dimensional arrays of subwavelength holes in metal films. We develop a Fano analysis of the related scattering problem by distinguishing two interfering contributions to the transmission process, namely a non-resonant contribution (direct scattering) and a resonant contribution (surface plasmon excitation). The introduction of a coupling strength between these two contributions naturally induces resonance shifts and asymmetry of profiles which satisfy simple scaling relations. We also report an experiment to confirm this analysis. (C) 2003 Elsevier B.V. All rights reserved.
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