Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001 · 26 citations · 1 references
Natural SciencesChemistryPhysicsOptical MaterialsOpticsSpectroscopyLiquid CrystalsOptical Properties Of MaterialsOptical SpectroscopyRefractive IndexTerahertz PhotonicsTerahertz SpectroscopyBirefringenceBirefringence In Liquid CrystalsNematic Liquid CrystalsTerahertz Time-domain SpectroscopyTime-domain Terahertz Spectroscopy
We present a first investigation of liquid crystals in the frequency range around 1 THz using THz time-domain spectroscopy. As a model system we use 4-(trans-4'- pentylcyclohexyl)-benzonitril (PCH-5). The THz refractive indices for the nematic state are comparable to that for visible frequencies. Yet, the THz birefringence of PCH-5 is smaller than its optical birefringence. Furthermore we find that PCH-5 has a rather small absorption.
1
Liquid-crystalline reference compounds
U. Finkenzeller, Thomas Geelhaar, G. Weber et al. · Liquid Crystals · 1989 · 81 citations