Terahertz spectroscopy across liquid crystalline phase transitions

被引：8
|
作者：
Reuter, M. [1 ,2 ]
Vieweg, N. [1 ,2 ,4 ]
Koch, M. [1 ,2 ]
Dierking, I. [3 ]
机构：
[1] Univ Marburg, Fac Phys, Renthof 5, D-35032 Marburg, Germany
[2] Univ Marburg, Ctr Mat Sci, Renthof 5, D-35032 Marburg, Germany
[3] Univ Manchester, Sch Phys & Astron, Oxford Rd, Manchester M13 9PL, Lancs, England
[4] TOPT Photon AG, Lochhamer Schlag 19, D-82166 Munich, Germany
来源：
APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 05期
关键词：
TIME-DOMAIN SPECTROSCOPY; FREQUENCY-RANGE; GENERATION;
D O I：
10.1063/1.4941666
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using terahertz time-domain spectroscopy we investigate the far-infrared properties of liquid crystal CE8 which exhibits a plethora of phases upon variation of the temperature. Phase transitions that are correlated with structural ordering at different dimensions clearly reflect in the terahertz refractive index. On the contrary, phase transitions related to ordering phenomena within a certain group of phases do not lead to significant steps in the n(T) relation. Nevertheless, we additionally demonstrate that also 2nd order phase transitions, like the SmA*-SmC* phase change, can be resolved by THz spectroscopy. (C) 2016 AIP Publishing LLC.
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页数：4
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