Title :
Terahertz properties of liquid crystals
Author :
Park, Hongkyu ; Fan, Fan ; Lim, Meehyun ; Han, Haewook ; Chigrinov, Vladimir G. ; MacPherson, Emma
Author_Institution :
ECE Dept., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
Liquid crystals (LCs) represent a very interesting material in the visible range but their properties in the terahertz (THz) range have not been extensively investigated yet. In this paper, we have investigated the THz properties of a set of LCs E7, BL037, and RDP97304 using terahertz time-domain spectroscopy. Refractive indices and absorption coefficients of ordinary and extraordinary axis of LCs are extracted from the measurements. We find that RDP97304 has the largest birefringence and smallest absorption in the THz range compared to E7 and BL037. Thus, RDP97304 is useful for developing efficient and fast THz devices.
Keywords :
absorption coefficients; birefringence; liquid crystals; refractive index; terahertz wave devices; terahertz wave spectra; BL037 LC; E7 LC; RDP97304 LC; THz devices; THz range; absorption coefficients; birefringence; liquid crystals; refractive indices; terahertz properties; terahertz time-domain spectroscopy; Absorption; Liquid crystals; Optical devices; Optical refraction; Optical variables control; Optimized production technology; Refractive index;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104918
