Two methods for modelling the propagation of terahertz radiation in a layered structure

Walker, G. C., Berry, E., Smye, S.W., Zinov'ev, N.N., Fitzgerald, A.J., Miles, R.E., Chamberlain, M. and Smith, M.A. (2003) Two methods for modelling the propagation of terahertz radiation in a layered structure. Journal of Biological Physics, 29 (2-3). pp. 141-148. ISSN 0092-0606 doi: 10.1023/A:1024484523964

Abstract/Summary

Modelling the interaction of terahertz(THz) radiation with biological tissueposes many interesting problems. THzradiation is neither obviously described byan electric field distribution or anensemble of photons and biological tissueis an inhomogeneous medium with anelectronic permittivity that is bothspatially and frequency dependent making ita complex system to model.A three-layer system of parallel-sidedslabs has been used as the system throughwhich the passage of THz radiation has beensimulated. Two modelling approaches havebeen developed a thin film matrix model anda Monte Carlo model. The source data foreach of these methods, taken at the sametime as the data recorded to experimentallyverify them, was a THz spectrum that hadpassed though air only.Experimental verification of these twomodels was carried out using athree-layered in vitro phantom. Simulatedtransmission spectrum data was compared toexperimental transmission spectrum datafirst to determine and then to compare theaccuracy of the two methods. Goodagreement was found, with typical resultshaving a correlation coefficient of 0.90for the thin film matrix model and 0.78 forthe Monte Carlo model over the full THzspectrum. Further work is underway toimprove the models above 1 THz.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/18834
Item Type	Article
Refereed	Yes
Divisions	Science
Uncontrolled Keywords	Biological tissue, modelling, Monte Carlo, simulation, skin, terahertz
Publisher	Springer
Download/View statistics	View download statistics for this item