Terahertz Frequency-Domain Spectroscopy Method for Vector Characterization of Liquid Using an Artificial Dielectric

A device for performing vector transmission spectroscopy on aqueous and polar solvent specimens at terahertz frequencies is presented. The device works on the principle of artificial dielectric birefringence by making a microfluidic grating in silicon. The device enables the direct measurement of th...

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Bibliographic Details
Published inIEEE transactions on terahertz science and technology Vol. 2; no. 1; pp. 113 - 122
Main Authors Saha, S. C., Grant, J. P., Yong Ma, Khalid, A., Feng Hong, Cumming, D. R. S.
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2012
Subjects
Atmospheric measurements
Birefringence
Dielectric measurements
Dielectrics
Gratings
liquid
material properties
Silicon
spectral method and analysis
Spectroscopy
submillimeter-wave devices
Vectors
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Summary:A device for performing vector transmission spectroscopy on aqueous and polar solvent specimens at terahertz frequencies is presented. The device works on the principle of artificial dielectric birefringence by making a microfluidic grating in silicon. The device enables the direct measurement of the complex dielectric function of a liquid, across a wide terahertz band using a Fourier transform infrared spectrometer. Characterization data from a range of liquid specimens, including alcohol, acetone, hydrogen peroxide and whiskies are presented. Using microfluidic sampling, specimen handling is straightforward and direct measurements on strongly terahertz absorbing solvents are possible. The method is scalable to longer or shorter wavelengths.
ISSN:2156-342X
2156-3446
DOI:10.1109/TTHZ.2011.2177172