Characterisation of biological materials at THz frequencies by attenuated total reflection: lard
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Date
2020-12-04
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
The penetration depth of an evanescent wave in Attenuated Total Reflection (ATR) is dependent on the wavelength of the radiation utilised. At THz frequencies, the penetration depth into biological tissues is in the order of 0.1 to 0.5 mm; rendered pig lard was used as a model sample in this study. A method for the direct measurement of the evanescent wave penetration depth is presented which allows for the estimation of the dispersion of the complex refractive index by using the reflection of the evanescent wave from varying sample depths. The method employs frustrated total internal reflection, and has been demonstrated by using the THz/Far-IR beamline at the Australian synchrotron, and modelled using finite difference time domain (FDTD) simulations. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Description
Keywords
Biological materials, THz range, Attenuation, Reflection, Skin, Pathology, NMR imaging, Computerized tomography, Melanomas, Radiation absorption analysis, Neoplasms, Data
Citation
Vilagosh, Z., Lajevardipour, A., Appadoo, D., Ng, S. H., Juodkazis, S., & Wood, A. W. (2020). Characterisation of biological materials at THz frequencies by attenuated total reflection: lard. Applied Sciences, 10(23), 8692. doi:10.3390/app10238692