Abstract
A metal film perforated with subwavelength-size periodic holes exhibits an extraordinary enhanced optical transmission in certain spectral ranges compare to the geometrical transmission of the same number of individual holes [1–3]. This enhancement is related to the excitation of surface plasmon polaritons (SPs) on a film with a periodic hole array [2,3]. The SP behaviour on the periodically structured surfaces attracts enormous attention itself due to possible numerous applications of the surface polariton optics as well as due to the SP localisation phenomena and related surface enhanced optical processes such as Raman scattering and second- harmonic generation.
© 2001 Optical Society of America
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