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

Peter Munro; Daniel Engelke; David Sampson

doi:10.1364/OE.22.005599

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

Peter Munro, Daniel Engelke, David Sampson

Centre for Microscopy, Characterisation & Analysis

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

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.

© 2014 Optical Society of America

Original language	English
Pages (from-to)	5599-5613
Journal	Optics Express
Volume	22
Issue number	5
DOIs	https://doi.org/10.1364/OE.22.005599
Publication status	Published - 4 Mar 2014

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title = "A compact source condition for modelling focused fields using the pseudospectral time-domain method",

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{\textquoteright}s similarity with that used by the FDTD suggests a way in which existing FDTD codes can be easily adapted to PSTD codes. {\textcopyright} 2014 Optical Society of America ",

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N2 - 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. © 2014 Optical Society of America

AB - 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. © 2014 Optical Society of America

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

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