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Type: Journal article
Title: The Christiansen effect in terahertz time-domain spectra of coarse-grained powders
Author: Franz, M.
Fischer, B.
Walther, M.
Citation: Applied Physics Letters, 2008; 92(2):021107-01-021107-03
Publisher: Amer Inst Physics
Issue Date: 2008
ISSN: 0003-6951
Statement of
Morten Franz, Bernd M. Fischer, and Markus Walther
Abstract: Spectral distortions are commonly observed in terahertz transmission spectra of ground substances immersed in a transparent host medium. This effect originates from scattering due to the index contrast between the grains and diluent. A phenomenological expression quantitatively accounts for the scattering induced attenuation and the phase delay experienced by the electric field transmitted through the sample. Based on the knowledge of the refractive indices of the sample and the host material, we present a procedure to eliminate the scattering contribution from the absorption spectra. © 2008 American Institute of Physics.
Keywords: Powders
refractive index
submillimetre wave spectra
Rights: © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
DOI: 10.1063/1.2831910
Appears in Collections:Aurora harvest
Electrical and Electronic Engineering publications

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