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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 16 — Aug. 15, 2013
  • pp: 2957–2960

Generation of sub-diffraction-limited pure longitudinal magnetization by the inverse Faraday effect by tightly focusing an azimuthally polarized vortex beam

Yunshan Jiang, Xiangping Li, and Min Gu  »View Author Affiliations


Optics Letters, Vol. 38, Issue 16, pp. 2957-2960 (2013)
http://dx.doi.org/10.1364/OL.38.002957


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Abstract

In this Letter we report on the generation of sub-diffraction-limited pure longitudinal magnetization in optomagnetic materials. The interaction between polarization singularities of cylindrically polarized beams and optical vortices in the tight focus of a high numerical-aperture objective as well as the induced magnetic fields through the inverse Faraday effect are investigated. A pure longitudinal magnetization distribution throughout the entire focal plane, which has a 15% reduction in the lateral full width at half-maximum, is achieved by tightly focusing an azimuthally polarized vortex beam.

© 2013 Optical Society of America

OCIS Codes
(210.3810) Optical data storage : Magneto-optic systems
(210.3820) Optical data storage : Magneto-optical materials
(260.1960) Physical optics : Diffraction theory
(260.5430) Physical optics : Polarization

ToC Category:
Optical Data Storage

History
Original Manuscript: June 10, 2013
Revised Manuscript: July 8, 2013
Manuscript Accepted: July 9, 2013
Published: August 5, 2013

Citation
Yunshan Jiang, Xiangping Li, and Min Gu, "Generation of sub-diffraction-limited pure longitudinal magnetization by the inverse Faraday effect by tightly focusing an azimuthally polarized vortex beam," Opt. Lett. 38, 2957-2960 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-16-2957


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