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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 28, Iss. 8 — Aug. 1, 2011
  • pp: 1776–1783

Improved near-field calculations using vectorial diffraction integrals in the finite-difference time-domain method

Ryan L. Coe and Eric J. Seibel  »View Author Affiliations

JOSA A, Vol. 28, Issue 8, pp. 1776-1783 (2011)

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We present an alternative mixed-surface implementation of the Stratton–Chu vectorial diffraction integrals as a means to improve near-field calculations outside the computational domain of the finite-difference time-domain method. This approach, originally derived for far-field calculations, reduces the effect of phase errors and reduces storage costs compared to standard single-surface implementations performed using arithmetic and geometric means. All three methods are applied to a strongly forward-scattering sphere, which is the gold standard for similar simulations with a corresponding analytical Mie series solution. Additionally, the mixed surface is applied to an ensemble of theoretical flow cytometry calibration standards in optical gel. The near-field electromagnetic scattering produced by these or any arbitrary object, such as a cell, could be used to simulate images in a high-numerical-aperture microscope. The results show the mixed-surface implementation outperforms the standard techniques for calculating the near-field electromagnetic fields.

© 2011 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(000.6800) General : Theoretical physics
(170.0180) Medical optics and biotechnology : Microscopy
(290.0290) Scattering : Scattering
(290.4020) Scattering : Mie theory
(050.1755) Diffraction and gratings : Computational electromagnetic methods

ToC Category:
Diffraction and Gratings

Original Manuscript: June 10, 2011
Manuscript Accepted: July 6, 2011
Published: August 1, 2011

Virtual Issues
Vol. 6, Iss. 9 Virtual Journal for Biomedical Optics

Ryan L. Coe and Eric J. Seibel, "Improved near-field calculations using vectorial diffraction integrals in the finite-difference time-domain method," J. Opt. Soc. Am. A 28, 1776-1783 (2011)

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