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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 5 — Apr. 29, 2014

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

Peter R.T. Munro, Daniel Engelke, and David D. Sampson  »View Author Affiliations

Optics Express, Vol. 22, Issue 5, pp. 5599-5613 (2014)

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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

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(180.0180) Microscopy : Microscopy
(050.1755) Diffraction and gratings : Computational electromagnetic methods

ToC Category:

Original Manuscript: January 2, 2014
Revised Manuscript: February 13, 2014
Manuscript Accepted: February 21, 2014
Published: March 4, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

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

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