Far-field detection of the dipole vortex
Optics Letters, Vol. 33, Issue 19, pp. 2269-2271 (2008)
http://dx.doi.org/10.1364/OL.33.002269
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Abstract
The energy flow lines (field lines of the Poynting vector) of electric dipole radiation exhibit a vortex structure in the near field when the dipole moment of the source is in circular rotation. The spatial extend of this vortex is smaller than a wavelength and may not be observable by a measurement in the near field. We show that the rotation of the field lines close to the source affects the image of the dipole in the far field, and this opens the possibility for observation of this vortex by a measurement in the far field.
© 2008 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
(080.4865) Geometric optics : Optical vortices
ToC Category:
Other Areas of Optics
History
Original Manuscript: July 16, 2008
Revised Manuscript: August 29, 2008
Manuscript Accepted: August 30, 2008
Published: September 30, 2008
Citation
Xin Li, Jie Shu, and Henk F. Arnoldus, "Far-field detection of the dipole vortex," Opt. Lett. 33, 2269-2271 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-19-2269
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