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

Samuel P. Mickan; R. Shvartsman; Jesper Munch; Xi-Cheng Zhang; Derek Abbott

doi:10.1117/12.497125

16 May 2003 Noise reduction in dual-thickness laser-based T-ray material characterization

Samuel P. Mickan, R. Shvartsman, Jesper Munch, Xi-Cheng Zhang, Derek Abbott

Proceedings Volume 5111, Fluctuations and Noise in Photonics and Quantum Optics; (2003) https://doi.org/10.1117/12.497125
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

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.

Citation Download Citation

Samuel P. Mickan, R. Shvartsman, Jesper Munch, Xi-Cheng Zhang, and Derek Abbott "Noise reduction in dual-thickness laser-based T-ray material characterization", Proc. SPIE 5111, Fluctuations and Noise in Photonics and Quantum Optics, (16 May 2003); https://doi.org/10.1117/12.497125

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