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Giant transmission and dissipation in perforated films mediated by surface phonon polaritons

D. Korobkin·Y. A. Urzhumov·B. Neuner III·G. Shvets·Z. Zhang·I. D. Mayergoyz
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Abstract

We experimentally and theoretically study electromagnetic properties of optically thin silicon carbide (SiC) membranes perforated by an array of sub-wavelength holes. Giant absorption and transmission is found using Fourier Transformed Infrared (FTIR) microscopy and explained by introducing a frequency-dependent effective permittivity $ε_{\rm eff}(ω)$ of the perforated film. The value of $ε_{\rm eff}(ω)$ is determined by the excitation of two distinct types of hole resonances: a delocalized slow surface polariton (SSP) whose frequency is largely determined by the array period, and a localized surface polariton (LSP) which corresponds to the resonances of an isolated hole. Only SSPs are shown to modify $ε_{\rm eff}(ω)$ strongly enough to cause giant transmission and absorption.

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D. Korobkin, Y. A. Urzhumov, B. Neuner III, G. Shvets, Z. Zhang, I. D. Mayergoyz. 2006-06-24. Giant transmission and dissipation in perforated films mediated by surface phonon polaritons. https://arxiv.org/abs/physics/0606207

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