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The chalcogenides represent a unique material platform, capable of providing high-index dielectric, plasmonic, ‘epsilon-near-zero’ (ENZ) or topological insulator properties when the constituent elements are combined in the right proportion. Moreover, they can exhibit reversible, non-volatile structural transitions between solid phases with vastly different electromagnetic properties. We report here...
We demonstrate experimentally and numerically the first ever observation of optical activity in a chiral metamaterial that is underpinned by the exotic resonant combination of an electric quadrupole and the elusive toroidal dipole.
In this work we experimentally demonstrate high-contrast electrical modulation of the near-IR spectra of plasmonic metamaterials, hybridised with liquid crystals by exploiting volume and, for the first time, in-plane switching regimes. We also show that in the resulting hybrid liquid-crystal (LC) optical cells the metamaterial structure can replace all three essential components of a LC device, namely...
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