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Proceedings Paper

Increased sensitivity in T-ray liquid spectroscopy using rapid sample modulation
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Paper Abstract

Pulsed 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.

Paper Details

Date Published: 8 April 2004
PDF: 15 pages
Proc. SPIE 5354, Terahertz and Gigahertz Electronics and Photonics III, (8 April 2004); doi: 10.1117/12.533682
Show Author Affiliations
Samuel P. Mickan, Univ. of Adelaide (Australia)
Jesper Munch, Univ. of Adelaide (Australia)
Xi-Cheng Zhang, Rensselaer Polytechnic Institute (United States)
Derek Abbott, Univ. of Adelaide (Australia)

Published in SPIE Proceedings Vol. 5354:
Terahertz and Gigahertz Electronics and Photonics III
R. Jennifer Hwu, Editor(s)

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