Increased sensitivity in T-ray liquid spectroscopy using rapid sample modulation
Date
2004
Authors
Mickan, S.
Munch, J.
Zhang, X.
Abbott, D.
Editors
Hwu, R.J.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Terahertz and gigahertz electronics and photonics III, 25-26 January 2004 / R. Jennifer Hwu (ed.): pp. 71-85
Statement of Responsibility
Samuel P. Mickan, Jesper Munch, Xi-Cheng Zhang, and Derek Abbott
Conference Name
Terahertz and Gigahertz Electronics and Photonics III (2004 : San Jose, California)
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.
School/Discipline
Dissertation Note
Provenance
Description
© 2004 COPYRIGHT SPIE--The International Society for Optical Engineering