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A compact source condition for modelling focused fields using the pseudospectral time-domain method

Munro, P.R.T., Engelke, D. and Sampson, David (2014) A compact source condition for modelling focused fields using the pseudospectral time-domain method Optics Express, 22 (5). pp. 5599-5613.

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Abstract

The pseudospectral time-domain (PSTD) method greatly extends the physical volume of biological tissue in which light scattering can be calculated, relative to the finite-difference time-domain (FDTD) method. We have developed an analogue of the total-field scattered-field source condition, as employed in FDTD, for introducing focussed illuminations into PSTD simulations. This new source condition requires knowledge of the incident field, and applies update equations, at a single plane in the PSTD grid. Numerical artifacts, usually associated with compact PSTD source conditions, are minimized by using a staggered grid. This source condition's similarity with that used by the FDTD suggests a way in which existing FDTD codes can be easily adapted to PSTD codes.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences
Faculty of Health and Medical Sciences
Authors :
NameEmailORCID
Munro, P.R.T.
Engelke, D.
Sampson, Davidd.sampson@surrey.ac.uk
Date : 2014
DOI : 10.1364/OE.22.005599
Uncontrolled Keywords : Finite difference time domain method, Biological tissues, Compact sources, Finite-difference time-domain (FDTD) methods, Physical volumes, Pseudo-spectral time-domain method, Pseudospectral time domain methods, Scattered field, Source conditions, Time domain analysis
Depositing User : Maria Rodriguez-Marquez
Date Deposited : 05 Jun 2018 09:20
Last Modified : 19 Sep 2018 11:32
URI: http://epubs.surrey.ac.uk/id/eprint/846798

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