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Optically controllable THz chiral metamaterials

TitleOptically controllable THz chiral metamaterials
Publication TypeJournal Article
Year of Publication2014
AuthorsKenanakis, G, Zhao, R, Katsarakis, N, Kafesaki, M, Soukoulis, CM, Economou, EN
JournalOptics Express
Volume22
Pagination12149-12159
Date Published05
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberWOS:000336957700077
Keywordscircular-dichroism, designs, photonic metamaterial
Abstract

Switchable and tunable chiral metamaterial response is numerically demonstrated here in different uniaxial chiral metamaterial structures operating in the THz regime. The structures are based on the bilayer conductor design and the tunable/switchable response is achieved by replacing parts of the metallic components of the structures by photoconducting Si, which can be transformed from an insulating to an almost conducting state through photoexcitation, achievable under external optical pumping. All the structures proposed and discussed here exhibit frequency regions with giant tunable circular dichroism, as well as regions with giant tunable optical activity, showing unique potential in the achievement of active THz polarization components, like tunable polarizers and polarization filters. (C) 2014 Optical Society of America

DOI10.1364/oe.22.012149
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Metamaterials