Modeling terahertz heating effects on water

Simple item page
dc.contributor.authorKristensen, T.
dc.contributor.authorWithayachumnankul, W.
dc.contributor.authorJepsen, P.
dc.contributor.authorAbbott, D.
dc.date.issued2010
dc.description.abstractWe apply Kirchhoff's heat equation to model the influence of a CW terahertz beam on a sample of water, which is assumed to be static. We develop a generalized model, which easily can be applied to other liquids and solids by changing the material constants. If the terahertz light source is focused down to a spot with a diameter of 0.5 mm, we find that the steady-state temperature increase per milliwatt of transmitted power is 1.8?C/mW. A quantum cascade laser can produce a CW beam in the order of several milliwatts and this motivates the need to estimate the effect of beam power on the sample temperature. For THz time domain systems, we indicate how to use our model as a worst-case approximation based on the beam average power. It turns out that THz pulses created from photoconductive antennas give a negligible increase in temperature. As biotissue contains a high water content, this leads to a discussion of worst-case predictions for THz heating of the human body in order to motivate future detailed study. An open source Matlab implementation of our model is freely available for use at www.eleceng.adelaide.edu.au/thz.
dc.description.statementofresponsibilityTorben T. L. Kristensen, Withawat Withayachumnankul, Peter U. Jepsen and Derek Abbott
dc.identifier.citationOptics Express, 2010; 18(5):4727-4739
dc.identifier.doi10.1364/OE.18.004727
dc.identifier.issn1094-4087
dc.identifier.issn1094-4087
dc.identifier.orcidWithayachumnankul, W. [0000-0003-1155-567X]
dc.identifier.orcidAbbott, D. [0000-0002-0945-2674]
dc.identifier.urihttp://hdl.handle.net/2440/59949
dc.language.isoen
dc.publisherOptical Soc Amer
dc.rights© Copyright 2010 Optical Society of America
dc.source.urihttps://doi.org/10.1364/oe.18.004727
dc.titleModeling terahertz heating effects on water
dc.typeJournal article
pubs.publication-statusPublished

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
hdl_59949.pdf
Size:
1.29 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Electrical and Electronic Engineering publications