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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 17 — Sep. 1, 2014
  • pp: 5022–5025

Ultralong pure longitudinal magnetization needle induced by annular vortex binary optics

Sicong Wang, Xiangping Li, Jianying Zhou, and Min Gu  »View Author Affiliations


Optics Letters, Vol. 39, Issue 17, pp. 5022-5025 (2014)
http://dx.doi.org/10.1364/OL.39.005022


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Abstract

In this Letter, based on the Richards and Wolf diffraction theory, an ultralong optical needle with pure transverse polarization is numerically generated by tightly focusing an azimuthally polarized beam through an annular vortex binary filter. Such an ultralong transversely polarized optical needle is generated through the π phase shift between adjacent rings of the binary filter. We show that such a pure transverse optical needle can induce pure longitudinal magnetization with a subwavelength lateral size (0.38λ) and an ultralong longitudinal depth (7.48λ) through the inverse Faraday effect. The corresponding needle aspect ratio of 20 is twice as large as that of the longitudinal magnetization needle generated by electron beam lithography.

© 2014 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(210.3820) Optical data storage : Magneto-optical materials
(260.5430) Physical optics : Polarization

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 16, 2014
Manuscript Accepted: July 19, 2014
Published: August 19, 2014

Citation
Sicong Wang, Xiangping Li, Jianying Zhou, and Min Gu, "Ultralong pure longitudinal magnetization needle induced by annular vortex binary optics," Opt. Lett. 39, 5022-5025 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-17-5022

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