Molecular Crystals and Liquid Crystals
Volume 561, Issue 1, 2012
U. Chodorow, J. Parka, K. Garbat, N. Pałka, K. Czupryński and L. Jaroszewicz
Institute of Applied Physics, Military University
of Technology, Warsaw, Poland
Institute of Microelectronics and
Optoelectronics, Warsaw University of Technology, Warsaw, Poland
Institute of Chemistry, Military University
of Technology, Warsaw, Poland
Institute of Optoelectronics, Military University
of Technology, Warsaw, Poland
Abstract
Properties of liquid crystal materials in
THz frequency range can be interesting from application point of view.
In this paper the influence of short and
long molecules added to liquid crystal 6CHBT were investigated. Change of
refractive indices and absorption coefficients for 6CHBT mixtures were compared
in the 0.3 - 3 THz frequency range. Influence of temperature on the mentioned
parameters of liquid crystal were investigated. Our study show that even a
slight change in shape and the composition of the molecules dopants affects the
macroscopic properties of liquid crystal. These properties depend on the length
of chains, the number of benzene or cyclohexane rings or the spatial
distribution of molecules and the interactions between them in the liquid crystal
mixture. Spectra measurements on the terahertz time-domain spectrometer were
performed.
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