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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • 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)

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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

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

Mufei Xiao, "Evanescent and propagating electromagnetic fields in scattering from point-dipole structures: comment," J. Opt. Soc. Am. A 19, 1447-1448 (2002)

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  1. T. Setälä, M. Kaivola, A. T. Friberg, “Evanescent and propagating electromagnetic fields in scattering from point-dipole structures,” J. Opt. Soc. Am. A 18, 678–688 (2001). [CrossRef]
  2. T. Setälä, A. T. Friberg, M. Kaivola, “Decomposition of the point-dipole field into homogeneous and evanescent parts,” Phys. Rev. E 59, 1200–1206 (1999). [CrossRef]
  3. M. Xiao, “On near-field scanning optical microscopy: homogeneous and evanescent radiation,” J. Mod. Opt. 44, 327–344 (1997). [CrossRef]
  4. See Ref. 1, Refs. 9–15.
  5. O. Keller, M. Xiao, S. Bozhevolnyi, “Configura-tional resonances in optical near-field microscopy: a rigorous point-dipole approach,” Surf. Sci. 280, 217–230 (1993). [CrossRef]
  6. M. Xiao, “Two-point optical resolution with homogeneous, evanescent and self field: Resolution criterion in near field imaging,” J. Mod. Opt. 44, 1609–1615 (1997). [CrossRef]
  7. M. Xiao, “On the evanescent field of dipole,” J. Mod. Opt. 47, 765–768 (2000).
  8. M. Xiao, “Optical fiber tip in front of a phase conjugator: focused light spot with inclusion of evanescent field contribution,” Appl. Phys. A 64, 91–99 (1997). [CrossRef]
  9. O. Keller, “Attached and radiated electromagnetic fields of an electric point dipole,” J. Opt. Soc. Am. B 16, 835–847 (1999). [CrossRef]

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