2013
DOI: 10.1117/12.2002883
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New plasmonic materials in visible spectrum through electrical charging

Abstract: Due to their negative permittivity, plasmonic materials have found increasing number of applications in advanced photonic devices and metamaterials, ranging from visible wavelength through microwave spectrum. In terms of intrinsic loss and permittivity dispersion, however, limitations on available plasmonic materials remain a serious bottleneck preventing practical applications of a few novel nano-photonic device and metamaterial concepts in visible and nearinfrared spectra.To overcome this obstacle, efforts h… Show more

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“…In this study, we present plasmonic enabled frequency selective surfaces, i.e., optical filters, based on metasurface (FSS) structures that are constructed from ultra-thin gold (Au) films whose permittivities have been determined through density functional theory (DFT) simulations 3 and confirmed experimentally. 4 These ultra-thin Au films possess large anisotropies in their DFT-based permittivities which are not predicted by classical models. We contrast the resonance behaviors of metasurface (FSS) structures using the DFT-based permittivities, 3 a commonly used Drude model, the experimentally obtained Johnson-Christy (JC) values, 5 and a size-dependent permittivity (SDP) model based on the JC data which incorporates a size-dependent dampening term and inter-band transitions.…”
mentioning
confidence: 99%
“…In this study, we present plasmonic enabled frequency selective surfaces, i.e., optical filters, based on metasurface (FSS) structures that are constructed from ultra-thin gold (Au) films whose permittivities have been determined through density functional theory (DFT) simulations 3 and confirmed experimentally. 4 These ultra-thin Au films possess large anisotropies in their DFT-based permittivities which are not predicted by classical models. We contrast the resonance behaviors of metasurface (FSS) structures using the DFT-based permittivities, 3 a commonly used Drude model, the experimentally obtained Johnson-Christy (JC) values, 5 and a size-dependent permittivity (SDP) model based on the JC data which incorporates a size-dependent dampening term and inter-band transitions.…”
mentioning
confidence: 99%