Low noise laser-based T-ray spectroscopy of liquids using double-modulated differential time-domain spectroscopy

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dc.contributor.authorMickan, S.
dc.contributor.authorShvartsman, R.
dc.contributor.authorMunch, J.
dc.contributor.authorZhang, X.
dc.contributor.authorAbbott, D.
dc.date.issued2004
dc.descriptionCopyright © Institute of Physics and IOP Publishing
dc.description.abstractLiquid transmission studies at terahertz frequencies (0.1–10 THz) are valuable for understanding solvation dynamics of salts, exploring long-range structure in mixtures and probing biomolecules in suspension. T-ray (or THz) time-domain spectroscopy, based on terahertz pulse generation from ultrafast lasers, is a sensitive technique for measuring material parameters in this frequency range. This paper proposes and demonstrates a novel technique for increasing the sensitivity and repeatability of liquid studies with T-ray time-domain spectroscopy (TDS), reducing relative parameter measurement errors below 0.0001. The proposed technique combines dual-thickness liquid measurement with rapid modulation (double-modulated differential TDS) to reduce the effect of both thickness-measurement errors and T-ray noise errors below 0.0001. The possible reduction in error is calculated and a liquid differential TDS (DTDS) prototype is demonstrated, incorporating amplitude and mean detection for near-simultaneous measurement of two T-ray waveforms.
dc.identifier.citationJournal of optics. B, Quantum and semiclassical optics : journal of the European Optical Society, 2004; 6(8):S786-S795
dc.identifier.doi10.1088/1464-4266/6/8/025
dc.identifier.issn1464-4266
dc.identifier.issn1741-3575
dc.identifier.orcidAbbott, D. [0000-0002-0945-2674]
dc.identifier.urihttp://hdl.handle.net/2440/18128
dc.language.isoen
dc.publisherIOP Publishing Ltd
dc.source.urihttp://www.iop.org/EJ/abstract/1464-4266/6/8/025
dc.titleLow noise laser-based T-ray spectroscopy of liquids using double-modulated differential time-domain spectroscopy
dc.typeJournal article
pubs.publication-statusPublished

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