Liquid crystal hyperbolic metamaterial for wide-angle negative-positive refraction and reflection

G. Pawlik; K. Tarnowski; W. Walasik; A. C. Mitus; I. C. Khoo

doi:10.1364/OL.39.001744

Liquid crystal hyperbolic metamaterial for wide-angle negative-positive refraction and reflection

G. Pawlik, K. Tarnowski, W. Walasik, A. C. Mitus, I. C. Khoo

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

We show that nanosphere dispersed liquid crystal (NDLC) metamaterial can be characterized in near IR spectral region as an indefinite medium whose real parts of effective ordinary and extraordinary permittivities are opposite in signs. Based on this fact we designed an electro-optic effect: an external electric-field-driven switch between normal refraction, negative refraction, and reflection of TM incident electromagnetic wave from the boundary vacuum/ NDLC. A detailed analysis of its functionality is given based on effective medium theory combined with a study of negative refraction in anisotropic metamaterials and finite elements simulations.

Original language	English (US)
Pages (from-to)	1744-1747
Number of pages	4
Journal	Optics Letters
Volume	39
Issue number	7
DOIs	https://doi.org/10.1364/OL.39.001744
State	Published - Apr 1 2014

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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AU - Pawlik, G.

AU - Tarnowski, K.

AU - Walasik, W.

AU - Mitus, A. C.

AU - Khoo, I. C.

PY - 2014/4/1

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AB - We show that nanosphere dispersed liquid crystal (NDLC) metamaterial can be characterized in near IR spectral region as an indefinite medium whose real parts of effective ordinary and extraordinary permittivities are opposite in signs. Based on this fact we designed an electro-optic effect: an external electric-field-driven switch between normal refraction, negative refraction, and reflection of TM incident electromagnetic wave from the boundary vacuum/ NDLC. A detailed analysis of its functionality is given based on effective medium theory combined with a study of negative refraction in anisotropic metamaterials and finite elements simulations.

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Liquid crystal hyperbolic metamaterial for wide-angle negative-positive refraction and reflection

Abstract

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