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Enhanced transmission of optically thick metallic films at infrared wavelengths

Dezhuan Han·Xin Li·Fengqin Wu·Jian Zi
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Abstract

For an optically thick metallic film, the transmission for both s- and p-polarized waves is extremely low. If the metallic film is coated on both sides with a finite dielectric layer, light transmission for $p$-polarized waves can be enhanced considerably. This enhancement is not related to surface plasmon-polaritions. Instead, it is due to the interplay between Fabry-Perot interference in the coated dielectric layer and the existence of the Brewster angle at the dielectric/metallic interface. It is shown that the coated metallic films can act as excellent polarizers at infrared wavelengths.

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Dezhuan Han, Xin Li, Fengqin Wu, Jian Zi. 2005-11-30. Enhanced transmission of optically thick metallic films at infrared wavelengths. https://doi.org/10.1063/1.2196467

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