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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 36, Iss. 3 — Feb. 1, 2011
  • pp: 349–351

Redistribution of energy flow in a material due to damping

Xin Li, Donna M. Pierce, and Henk F. Arnoldus  »View Author Affiliations

Optics Letters, Vol. 36, Issue 3, pp. 349-351 (2011)

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The field lines of energy flow of the radiation emitted by a linear dipole in free space are straight lines, running radially outward from the source. When the dipole is embedded in a medium, the field lines are curves when the imaginary part of the relative permittivity is finite. It is shown that due to the damping in the material all radiation is emitted in directions perpendicular to the dipole axis, whereas for a dipole in free space the radiation is emitted in all directions except along the dipole axis. It is also shown that some field lines in the near field form semiloops. Energy flowing along these semiloops is absorbed by the material and does not contribute to the radiative power in the far field.

© 2011 Optical Society of America

OCIS Codes
(260.2110) Physical optics : Electromagnetic optics
(260.2160) Physical optics : Energy transfer
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Physical Optics

Original Manuscript: November 9, 2010
Revised Manuscript: December 1, 2010
Manuscript Accepted: December 6, 2010
Published: January 25, 2011

Xin Li, Donna M. Pierce, and Henk F. Arnoldus, "Redistribution of energy flow in a material due to damping," Opt. Lett. 36, 349-351 (2011)

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  1. M. W. McCall, A. Lakhtakia, and W. S. Weiglhofer, Eur. J. Phys. 23, 353 (2002). [CrossRef]
  2. J. D. Jackson, Classical Electrodynamics, 3rd. ed. (Wiley, 1999).
  3. J. Shu, X. Li, and H. F. Arnoldus, J. Mod. Opt. 55, 2457 (2008). [CrossRef]

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