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Evaluating liquid crystal properties for use in terahertz devices.
Park, Hongkyu,Parrott, Edward P J,Fan, Fan,Lim, Meehyun,Han, Haewook,Chigrinov, Vladimir G,Pickwell-MacPherson, Emma Optical Society of America 2012 Optics express Vol.20 No.11
<P>Despite the wide application of liquid crystals (LCs) in the visible frequency range, their properties in the terahertz range have not yet been extensively investigated. In this paper we have investigated the terahertz properties of LCs E7, BL037, RDP-94990 and RDP-97304 using terahertz time-domain-spectroscopy. We find that RDP-94990 has the largest birefringence and smallest absorption in the terahertz range compared to E7 and BL037. We highlight the importance of investigating all parameters, not just the birefringence, when designing fast, efficient and transmissive terahertz LC devices.</P>