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Article

Characterisation of Biological Materials at THz Frequencies by Attenuated Total Reflection: Lard

1
Australian Centre for Electromagnetic Bioeffects Research, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
2
Australian Synchrotron, THz Far Infrared Beamline, Clayton, VIC 3168, Australia
3
Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
4
World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8692; https://doi.org/10.3390/app10238692
Received: 13 November 2020 / Revised: 29 November 2020 / Accepted: 30 November 2020 / Published: 4 December 2020
(This article belongs to the Special Issue Advances of THz Spectroscopy)
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. View Full-Text
Keywords: ATR; THz; synchrotron radiation; lard ATR; THz; synchrotron radiation; lard
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MDPI and ACS Style

Vilagosh, Z.; Lajevardipour, A.; Appadoo, D.; Ng, S.H.; Juodkazis, S.; Wood, A.W. Characterisation of Biological Materials at THz Frequencies by Attenuated Total Reflection: Lard. Appl. Sci. 2020, 10, 8692. https://doi.org/10.3390/app10238692

AMA Style

Vilagosh Z, Lajevardipour A, Appadoo D, Ng SH, Juodkazis S, Wood AW. Characterisation of Biological Materials at THz Frequencies by Attenuated Total Reflection: Lard. Applied Sciences. 2020; 10(23):8692. https://doi.org/10.3390/app10238692

Chicago/Turabian Style

Vilagosh, Zoltan, Alireza Lajevardipour, Dominique Appadoo, Soon H. Ng, Saulius Juodkazis, and Andrew W. Wood. 2020. "Characterisation of Biological Materials at THz Frequencies by Attenuated Total Reflection: Lard" Applied Sciences 10, no. 23: 8692. https://doi.org/10.3390/app10238692

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