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| VOLUME 89 | ISSUE 2 |
PAGE 75
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| Physical nature of anomalous optical transmission of thin absorptive corrugated films |
N. L. Dmitruk, A.V. Korovin1)
Institute for Physics Semiconductors, NAS Ukraine, Kiev, Ukraine
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PACS: 42.79.Dj, 71.36.+c, 73.20.Mf, 78.66.Bz
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Abstract
The enhancement of p-polarized light transmittance through
periodically relief thin absorptive film on dielectric or semiconductor
substrate was considered theoretically. The calculation of
transmittance/reflectance was performed in the framework of modified
differential formalism method. Numerical results obtained for noble metals
(Au, Ag and Cu) under arbitrary relief correlation between two sides of film
allow ascertaining physical nature of surface electromagnetic fields
responsible for the enhancement transmittance effect. These are Fano,
Zenneck-Sommerfeld and Brewster modes on the interfaces with absorbing
medium. For anticorrelated reliefs of opposite film surfaces the bound of
their modes was found especially effective.
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