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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

  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 3 — Mar. 1, 2008
  • pp: 805–810

Constituents of power of an electric dipole of finite size

S. R. Seshadri  »View Author Affiliations


JOSA A, Vol. 25, Issue 3, pp. 805-810 (2008)
http://dx.doi.org/10.1364/JOSAA.25.000805


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Abstract

An electric dipole of finite size in the form of a spherical current sheet with a surface current density in the θ direction varying as sin θ is introduced. External to the spherical surface, the electromagnetic fields are of the same form as that of a point electric dipole situated at the origin and oriented in the z direction. The power and the power flux density are separated into the radiative and the reactive parts. This type of separation of power is related to the usual separation made on the basis of propagating and evanescent waves. There is a natural relationship between the radiative and the reactive parts with the far-field and the near-field effects, respectively.

© 2008 Optical Society of America

OCIS Codes
(260.2110) Physical optics : Electromagnetic optics
(350.5500) Other areas of optics : Propagation

ToC Category:
Physical Optics

History
Original Manuscript: November 9, 2007
Revised Manuscript: January 18, 2008
Manuscript Accepted: January 18, 2008
Published: February 25, 2008

Citation
S. R. Seshadri, "Constituents of power of an electric dipole of finite size," J. Opt. Soc. Am. A 25, 805-810 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-3-805

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