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

Jeremy A. Bossard, Xiaotao Liang, Ling Li, Seokho Yun, Douglas Henry Werner, Brian Weiner, Theresa S. Mayer, Paul F. Cristman, Andres Diaz, Iam-choon Khoo

Research output: Contribution to journalArticle

112 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)1308-1320
Number of pages13
JournalIEEE Transactions on Antennas and Propagation
Volume56
Issue number5
DOIs
StatePublished - May 1 2008

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Frequency selective surfaces
Metamaterials
Liquid crystals
Infrared radiation
Optical switches
Nematic liquid crystals
Refraction
Surface structure
Genetic algorithms
Doping (additives)
Wavelength
Substrates

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Bossard, Jeremy A. ; Liang, Xiaotao ; Li, Ling ; Yun, Seokho ; Werner, Douglas Henry ; Weiner, Brian ; Mayer, Theresa S. ; Cristman, Paul F. ; Diaz, Andres ; Khoo, Iam-choon. / Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals. In: IEEE Transactions on Antennas and Propagation. 2008 ; Vol. 56, No. 5. pp. 1308-1320.
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Tunable frequency selective surfaces and negative-zero-positive index metamaterials based on liquid crystals. / Bossard, Jeremy A.; Liang, Xiaotao; Li, Ling; Yun, Seokho; Werner, Douglas Henry; Weiner, Brian; Mayer, Theresa S.; Cristman, Paul F.; Diaz, Andres; Khoo, Iam-choon.

In: IEEE Transactions on Antennas and Propagation, Vol. 56, No. 5, 01.05.2008, p. 1308-1320.

Research output: Contribution to journalArticle

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AU - Weiner, Brian

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