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Dielectric permittivity modulation of liquid crystals for microwave applications

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Xu, H., Trushkevych, Oksana, Collings, N. and Crossland, W. A. (2009) Dielectric permittivity modulation of liquid crystals for microwave applications. Molecular Crystals and Liquid Crystals, 502 (1). pp. 235-244. doi:10.1080/15421400902817346

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Official URL: http://dx.doi.org/10.1080/15421400902817346

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Abstract

This work presents the measurement of the dielectric anisotropy of selected nematic liquid crystals in the 0.01–6 GHz range, and comparison of the measurements with the birefringence values at optical frequencies. The effect of alignment on the reproducibility of dielectric measurements was also measured. It was found that a good surface alignment is essential to achieve reproducibility. Finally, it was experimentally confirmed that there is a strong correlation between the dielectric anisotropy in the microwave region and the birefringence at visible frequencies.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Liquid crystals, Dielectrics, Microwave devices
Journal or Publication Title: Molecular Crystals and Liquid Crystals
Publisher: Taylor & Francis
ISSN: 1542-1406
Official Date: 1 June 2009
Dates:
DateEvent
1 June 2009Published
1 October 2008Accepted
Volume: 502
Number: 1
Page Range: pp. 235-244
DOI: 10.1080/15421400902817346
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: University of Cambridge. Centre for Advanced Photonics and Electronics (CAPE), ALPS Electric (Firm), Dow Corning Corporation

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