Journal
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
Volume 31, Issue 11, Pages 1312-1320Publisher
SPRINGER
DOI: 10.1007/s10762-010-9721-1
Keywords
Liquid crystals; Terahertz; Spectroscopy; Birefringence
Funding
- Studienstiftung des deutschen Volkes
- Braunschweig International School of Metrology (IGSM)
- Syrian Ministry of Higher Education
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We systematically study the terahertz (THz) properties of a set of nematic liquid crystals. We use THz time domain spectroscopy to obtain data between 0.2 THz up to 2.5 THz. Such a broadband set of terahertz data has not yet been reported. From the measured data, we extract macroscopic data, such as the birefringence, the refractive indices and the absorption coefficients for ordinary and extraordinary polarization. The impact of different side chains and core structures on the terahertz anisotropy are discussed. This paper will serve as a data base and can be very useful for the design of new terahertz liquid crystal material.
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