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Proceedings Paper

Noise reduction in dual-thickness laser-based T-ray material characterization
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Paper Abstract

Pulsed THz (T-ray) spectroscopy is an increasingly wide-spread tool for studying materials from physics to biology. Liquid transmission T-ray studies are valuable for understanding solvation dynamics of salts, exploring long-range structure in mixtures and probing biomolecules in suspension. In this paper the uncertainty in parameter estimation of liquid samples is shown to be dependent on the thickness change of the sample, and on the noise of the T-ray spectrometer. For many important liquids, such as water, with high THz absorption, we show that measurement uncertainty can be greatly decreased using a dynamically-modulated liquid sample, using differential T-ray time-domain spectroscopy (DTDS). Preliminary experiments support these calculations.

Paper Details

Date Published: 16 May 2003
PDF: 16 pages
Proc. SPIE 5111, Fluctuations and Noise in Photonics and Quantum Optics, (16 May 2003); doi: 10.1117/12.497125
Show Author Affiliations
Samuel P. Mickan, The Univ. of Adelaide (Australia)
Rensselaer Polytechnic Institute (United States)
R. Shvartsman, Rensselaer Polytechnic Institute (United States)
Jesper Munch, The Univ. of Adelaide (Australia)
Xi-Cheng Zhang, Rensselaer Polytechnic Institute (United States)
Derek Abbott, The Univ. of Adelaide (Australia)

Published in SPIE Proceedings Vol. 5111:
Fluctuations and Noise in Photonics and Quantum Optics
Derek Abbott; Jeffrey H. Shapiro; Yoshihisa Yamamoto, Editor(s)

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