Applied Physics Letters · 2003 · 32 citations · 19 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsMaterials CharacterizationSpectroscopyDielectric PropertiesDielectric ResponseDielectricsOptical SpectroscopyTerahertz SpectroscopyTime-resolved SpectroscopyAnisotropic PolarizabilityDebye ModelDielectric FunctionDielectric RelaxationFrequency-dependent AbsorptionMolecular PolarizabilityTerahertz Time-domain SpectroscopyTime-domain Terahertz Spectroscopy
Terahertz time-domain spectroscopy is used to investigate the dielectric relaxation properties of liquid CS2. The frequency-dependent absorption coefficient and index of refraction were measured in the frequency range 0.2–2.0 THz. The ultrafast dielectric relaxation time of liquid CS2 was determined to be 630±30 fs by fitting the dielectric function to the Debye model which is attributed to average time for rocking and rotational response of the CS2 molecules possessing an anisotropic polarizability.
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