Plasmonic nanohelix metamaterials with tailorable giant circular dichroism

Plasmonic nanohelix arrays are shown to interact with electromagnetic fields in ways not typically seen with ordinary matter. Chiral metamaterials (CMMs) with feature sizes small with respect to the wavelength of visible light are a promising route to experimentally achieve such phenomena as negativ...

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Veröffentlicht in:	Applied physics letters 2013-11, Vol.103 (21)
Hauptverfasser:	Gibbs, J G, Mark, A G, Eslami, S, Fischer, P
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied physics Approximation Dichroism Electromagnetic fields Mathematical morphology Metamaterials Optical activity
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container_title	Applied physics letters
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creator	Gibbs, J G Mark, A G Eslami, S Fischer, P
description	Plasmonic nanohelix arrays are shown to interact with electromagnetic fields in ways not typically seen with ordinary matter. Chiral metamaterials (CMMs) with feature sizes small with respect to the wavelength of visible light are a promising route to experimentally achieve such phenomena as negative refraction without the need for simultaneously negative ε and μ. Here we not only show that giant circular dichroism in the visible is achievable with hexagonally arranged plasmonic nanohelix arrays, but that we can precisely tune the optical activity via morphology and lattice spacing. The discrete dipole approximation is implemented to support experimental data.
doi_str_mv	10.1063/1.4829740
format	Article
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source	AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection
subjects	Applied physics Approximation Dichroism Electromagnetic fields Mathematical morphology Metamaterials Optical activity
title	Plasmonic nanohelix metamaterials with tailorable giant circular dichroism
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