Mickan, S.Munch, J.Zhang, X.Abbott, D.Hwu, R.J.2007-05-142007-05-142004Terahertz and gigahertz electronics and photonics III, 25-26 January 2004 / R. Jennifer Hwu (ed.): pp. 71-8508194527930277-786Xhttp://hdl.handle.net/2440/28584© 2004 COPYRIGHT SPIE--The International Society for Optical EngineeringPulsed THz (T-ray) spectroscopy is sensitive, non-invasive tool for studying materials from physics to biology, but transmission measurements of liquid samples, especially water, have been limited by noise. This paper shows that the accuracy of T-ray material parameter measurements of liquid samples can be greatly increased, especially for highly-absorbing liquids, by using a rapid modulation of the liquid in the T-ray beam path, coupled with a novel implementation of mean and amplitude detection to T-ray spectroscopy. The experiments are supported by calculations quantifying the sources of uncertainty. Liquid transmission T-ray studies are valuable for understanding solvation dynamics of salts, exploring long-range structure in mixtures and probing biomolecules in suspension.enConference paper002004076910.1117/12.5336820002217952000082-s2.0-304259534056781Abbott, D. [0000-0002-0945-2674]