Binary and core-shell nanoparticle dispersed liquid crystal cells for metamaterial applications

We theoretically explored the feasibility of a tunable metamaterial using binary as well as core-shell nanoparticle dispersed liquid crystal cells in the infrared and optical regimes. Owing to the spatial variation of the permittivity of the liquid crystal host upon the application of a bias voltage...

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Bibliographic Details
Published in:Journal of nanophotonics 2011-01, Vol.5 (1), p.051603-051603
Main Authors: Nehmetallah, Georges T, Aylo, Rola, Banerjee, Partha P
Format: Article
Language:English
Subjects:
Bias
Dispersion
Electric potential
Liquid crystals
Metamaterials
Nanocomposites
Nanomaterials
Nanostructure
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Summary:We theoretically explored the feasibility of a tunable metamaterial using binary as well as core-shell nanoparticle dispersed liquid crystal cells in the infrared and optical regimes. Owing to the spatial variation of the permittivity of the liquid crystal host upon the application of a bias voltage, the host was decomposed into a layered medium and the effective refractive index recalculated for each layer due to the distribution of polaritonic and plasmonic nanoparticles. The scattering, extinction, and absorption of such a nanoparticle dispersed liquid crystal cell were also found. Depending on the applied voltage bias across the liquid crystal host, the types of nanoparticles used, and their radii and volume-filling fractions in the liquid crystal host, near-zero as well as negative index of refraction can be obtained over a range of frequencies, according to the effective medium theory.
ISSN:1934-2608
1934-2608
DOI:10.1117/1.3576117