Evaluating liquid crystal properties for use in terahertz devices.
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.
Department of Electrical and Computer Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong.
Hongkyu
H
Park
Edward P J
EP
Parrott
Fan
F
Fan
Meehyun
M
Lim
Haewook
H
Han
Vladimir G
VG
Chigrinov
Emma
E
Pickwell-MacPherson
D008027:Light; D050866:Liquid Crystals / Q000737:chemistry*; D008422:Materials Testing; D012031:Refractometry; D012542:Scattering, Radiation; D055053:Terahertz Radiation