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Terahertz properties of fluorinated liquid crystals |
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| Authors: | Urszula Chodorow Janusz Parka Przemyslaw Kula Jakub Herman Olga Chojnowska Roman Dabrowski |
| Affiliation: | 1. Institute of Applied Physics, Military University of Technology, Warsaw, Poland;2. Department of Electrical and Computer Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Konguchodorow@wat.edu.pl;4. Institiute of Microelectronics and Optoelectronics, Warsaw University of Technology, Warsaw, Poland;5. Institute of Chemistry, Military University of Technology, Warsaw, Poland |
| Abstract: | In this article, optical properties of four fluoro-substituted 4-propyl-4′-[(4-ethylphenyl)ethynyl] biphenyls and liquid crystal mixture A are presented in the terahertz (THz) range. Birefringence, refractive indices and absorption coefficients for ordinary and extraordinary ray of liquid crystals are described in the range of 0.3 to 3.0 THz. It shows that the measured parameters are dependent on the number and placement of fluorine atoms in the molecules. Measurements have been performed using time-pulsed spectroscopy. |
| Keywords: | terahertz liquid crystal spectroscopy absorption birefringence |