Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/59949
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Type: | Journal article |
Title: | Modeling terahertz heating effects on water |
Author: | Kristensen, T. Withayachumnankul, W. Jepsen, P. Abbott, D. |
Citation: | Optics Express, 2010; 18(5):4727-4739 |
Publisher: | Optical Soc Amer |
Issue Date: | 2010 |
ISSN: | 1094-4087 1094-4087 |
Statement of Responsibility: | Torben T. L. Kristensen, Withawat Withayachumnankul, Peter U. Jepsen and Derek Abbott |
Abstract: | We 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. |
Rights: | © Copyright 2010 Optical Society of America |
DOI: | 10.1364/OE.18.004727 |
Published version: | http://dx.doi.org/10.1364/oe.18.004727 |
Appears in Collections: | Aurora harvest 5 Electrical and Electronic Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_59949.pdf | Published version | 1.32 MB | Adobe PDF | View/Open |
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