Terahertz Absorption of Nematic Liquid Crystals

被引：18

作者：

Vieweg, Nico ^{[1
,2
,6
]}

Celik, Mehmet Ali ^{[2
,3
]}

Zakel, Sabine ^{[4
]}

Gupta, Vineet ^{[1
,2
,5
]}

Frenking, Gernot ^{[2
,3
]}

Koch, Martin ^{[1
,2
]}

机构：

[1] Univ Marburg, Fac Phys, D-35032 Marburg, Germany

[2] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany

[3] Univ Marburg, Fac Chem, D-35032 Marburg, Germany

[4] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

[5] Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, India

[6] TOPTICA Photon AG, D-82166 Munich, Germany

来源：

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES | 2014年 / 35卷 / 05期

关键词：

terahertz spectroscopy; fourier transforminfrared spectroscopy; liquid crystals; far infrared; VIBRATIONAL-MODES; SPECTROSCOPY; ENERGY; APPROXIMATION; SPECTRA;

D O I：

10.1007/s10762-014-0062-3

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present the first systematic study of cyanobiphenyls (CBs) and the phenylcyclohexanes in the range between 50 cm(-1) (1.5 THz) and 500 cm(-1) (15 THz). The impact of the alkyl chain length and of variations in the core structure on the spectrum is investigated using liquid crystals from the cyanobiphenyl and phenylcyclohexane families. Our measurements are supported by calculations based on density functional theory. This enables us to shine light on the vibrational dynamics of liquid crystal molecules in the terahertz frequency range.

引用

页码：478 / 485

页数：8

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