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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 7 — Jul. 1, 2002
  • pp: 1447–1448

Evanescent and propagating electromagnetic fields in scattering from point-dipole structures: comment

Mufei Xiao  »View Author Affiliations


JOSA A, Vol. 19, Issue 7, pp. 1447-1448 (2002)
http://dx.doi.org/10.1364/JOSAA.19.001447


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Abstract

I comment on the recent paper by Setälä et al. [J. Opt. Soc. Am. A 18, 678 (2001)]. In that paper the calculation is entirely and exactly adopted from our previous work except the evanescent-field propagator. I shall demonstrate that the replacement of the propagator flaws the calculation. In their paper the numerical results show rich subwavelength information at absolute far-field distances (four times larger than the wavelength). I shall point out that the evanescent resolution at far-field distances cannot be of subwavelength. In the paper by Setälä et al. the description of previous work is inaccurate and misleading. I shall give what I consider to be the correct guidelines for readers to learn about the standing controversy regarding the evanescent field of a dipole.

© 2002 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(260.2110) Physical optics : Electromagnetic optics
(350.5500) Other areas of optics : Propagation

History
Original Manuscript: August 22, 2001
Manuscript Accepted: January 14, 2002
Published: July 1, 2002

Citation
Mufei Xiao, "Evanescent and propagating electromagnetic fields in scattering from point-dipole structures: comment," J. Opt. Soc. Am. A 19, 1447-1448 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-7-1447

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