Abstract

This is a comment in response to the claims made in a recent paper by Zhang and Ding [Opt. Express 17, 22235-22239 (2009)]. The authors claimed that an error has been found in a previous paper [Opt. Express 12, 3377-3382 (2004)] and provided a “guess” of how the Poynting vector was calculated. These claims are incorrect and are based on a misconception.

© 2010 OSA

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References

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  1. Y. Zhang and B. Ding, “Magnetic field distribution of a highly focused radially-polarized light beam,” Opt. Express 17(24), 22235–22239 (2009).
    [CrossRef] [PubMed]
  2. Q. Zhan, “Trapping metallic Rayleigh particles with radial polarization,” Opt. Express 12(15), 3377–3382 (2004).
    [CrossRef] [PubMed]
  3. K. Youngworth and T. Brown, “Focusing of high numerical aperture cylindrical-vector beams,” Opt. Express 7(2), 77–87 (2000).
    [CrossRef] [PubMed]
  4. B. Richards and E. Wolf, “Electromagnetic diffraction in optical systems II. Structure of the image field in an aplanatic system,” Proc. R. Soc. Lond. A Math. Phys. Sci. 253(1274), 358–379 (1959).
    [CrossRef]

2009 (1)

2004 (1)

2000 (1)

1959 (1)

B. Richards and E. Wolf, “Electromagnetic diffraction in optical systems II. Structure of the image field in an aplanatic system,” Proc. R. Soc. Lond. A Math. Phys. Sci. 253(1274), 358–379 (1959).
[CrossRef]

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Equations (2)

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P = 1 2 μ 0 c E 0 2 S = n 2 μ 0 c E 1 2 S ,
E 1 = E 0 / n .

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