Format

Send to

Choose Destination
See comment in PubMed Commons below
Opt Express. 2012 Dec 17;20(27):28249-56. doi: 10.1364/OE.20.028249.

Ultrabroadband terahertz spectroscopy of a liquid crystal.

Author information

1
Fachbereich Physik, Philipps-Universität Marburg, Hans-Meerwein-Straße MZG C06, 35032 Marburg, Germany.

Abstract

Liquid crystals (LCs) are becoming increasingly important for applications in the terahertz frequency range. A detailed understanding of the spectroscopic parameters of these materials over a broad frequency range is crucial in order to design customized LC mixtures for improved performance. We present the frequency dependent index of refraction and the absorption coefficients of the nematic liquid crystal 5CB over a frequency range from 0.3 THz to 15 THz using a dispersion-free THz time-domain spectrometer system based on two-color plasma generation and air biased coherent detection (ABCD). We show that the spectra are dominated by multiple strong spectral features mainly at frequencies above 4 THz, originating from intramolecular vibrational modes of the weakly LC molecules.

PMID:
23263058
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Support Center