Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals

Jeremy A. Bossard; Xiaotao Liang; Ling Li; Seokho Yun; Douglas H. Werner; Brian Weiner; Theresa S. Mayer; Paul F. Cristman; Andres Diaz; I. C. Khoo

doi:10.1109/TAP.2008.922174

Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals

Jeremy A. Bossard, Xiaotao Liang, Ling Li, Seokho Yun, Douglas H. Werner, Brian Weiner, Theresa S. Mayer, Paul F. Cristman, Andres Diaz, I. C. Khoo

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165 Scopus citations

Abstract

We utilize the properties of aligned nematic liquid crystal (LC) cells in the design of: (i) a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values and (ii) micron-scale metallodielectric and all-dielectric tunable frequency selective surfaces (FSSs). The metamaterial is constructed by randomly doping a liquid crystal substrate with coated dielectric (non-magnetic) spheres and can be utilized over a large spectral range. FSSs with a liquid crystal superstrate are synthesized using conventional and genetic algorithm methods to exhibit broadband tunable filter characteristics at mid-infrared (mid-IR) wavelengths. These LC tunable FSS structures can be used to develop a new class of infrared/ optical switches for terahertz applications.

Original language	English (US)
Pages (from-to)	1308-1320
Number of pages	13
Journal	IEEE Transactions on Antennas and Propagation
Volume	56
Issue number	5
DOIs	https://doi.org/10.1109/TAP.2008.922174
State	Published - May 2008

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/TAP.2008.922174

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title = "Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals",

abstract = "We utilize the properties of aligned nematic liquid crystal (LC) cells in the design of: (i) a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values and (ii) micron-scale metallodielectric and all-dielectric tunable frequency selective surfaces (FSSs). The metamaterial is constructed by randomly doping a liquid crystal substrate with coated dielectric (non-magnetic) spheres and can be utilized over a large spectral range. FSSs with a liquid crystal superstrate are synthesized using conventional and genetic algorithm methods to exhibit broadband tunable filter characteristics at mid-infrared (mid-IR) wavelengths. These LC tunable FSS structures can be used to develop a new class of infrared/ optical switches for terahertz applications.",

author = "Bossard, {Jeremy A.} and Xiaotao Liang and Ling Li and Seokho Yun and Werner, {Douglas H.} and Brian Weiner and Mayer, {Theresa S.} and Cristman, {Paul F.} and Andres Diaz and Khoo, {I. C.}",

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T1 - Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals

AU - Bossard, Jeremy A.

AU - Liang, Xiaotao

AU - Li, Ling

AU - Yun, Seokho

AU - Werner, Douglas H.

AU - Weiner, Brian

AU - Mayer, Theresa S.

AU - Cristman, Paul F.

AU - Diaz, Andres

AU - Khoo, I. C.

PY - 2008/5

Y1 - 2008/5

N2 - We utilize the properties of aligned nematic liquid crystal (LC) cells in the design of: (i) a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values and (ii) micron-scale metallodielectric and all-dielectric tunable frequency selective surfaces (FSSs). The metamaterial is constructed by randomly doping a liquid crystal substrate with coated dielectric (non-magnetic) spheres and can be utilized over a large spectral range. FSSs with a liquid crystal superstrate are synthesized using conventional and genetic algorithm methods to exhibit broadband tunable filter characteristics at mid-infrared (mid-IR) wavelengths. These LC tunable FSS structures can be used to develop a new class of infrared/ optical switches for terahertz applications.

AB - We utilize the properties of aligned nematic liquid crystal (LC) cells in the design of: (i) a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values and (ii) micron-scale metallodielectric and all-dielectric tunable frequency selective surfaces (FSSs). The metamaterial is constructed by randomly doping a liquid crystal substrate with coated dielectric (non-magnetic) spheres and can be utilized over a large spectral range. FSSs with a liquid crystal superstrate are synthesized using conventional and genetic algorithm methods to exhibit broadband tunable filter characteristics at mid-infrared (mid-IR) wavelengths. These LC tunable FSS structures can be used to develop a new class of infrared/ optical switches for terahertz applications.

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JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

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ER -

Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals

Abstract

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