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.
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Copyright © 2011, Society of Photo-Optical Instrumentation Engineers (SPIE)
Society of Photo-Optical Instrumentation Engineers (SPIE)
Nehmetallah, George; Aylo, Rola; and Banerjee, Partha P., "Binary and Core-Shell Nanoparticle Dispersed Liquid Crystal Cells for Metamaterial Applications" (2011). Electrical and Computer Engineering Faculty Publications. 105.
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