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Optical Engineering

Highly birefringent nematic mixtures at room temperature for microwave applications
Author(s): Artiom Lapanik; Wolfgang Haase; Felix Golden; Stefan Muller; Rolf Jakoby
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Paper Abstract

We present results on how the dielectric anisotropy in the low frequency region up to 1 GHz and the birefringence of the nematic liquid crystal (LC) phase at optical wavelength (589 nm) influences the performance of LC mixtures at microwave frequencies. For this, we prepared a wide range of mixtures being nematic at room temperature and containing different classes of promising compounds. Their quasistatic and frequency depended dielectric properties, their birefringence and the impact of those properties on their microwave behavior were investigated. The measurements were done using the cavity perturbation method at 30 and 38 GHz, respectively, in the temperature interval of -20°C and 135°C.

Paper Details

Date Published: 1 August 2011
PDF: 8 pages
Opt. Eng. 50(8) 081208 doi: 10.1117/1.3564878
Published in: Optical Engineering Volume 50, Issue 8
Show Author Affiliations
Artiom Lapanik, Technische Univ. Darmstadt (Germany)
Wolfgang Haase, Technische Univ. Darmstadt (Germany)
Felix Golden, Technische Univ. Darmstadt (Germany)
Stefan Muller, Technische Univ. Darmstadt (Germany)
Rolf Jakoby, Technische Univ. Darmstadt (Germany)

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