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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 10083–10094

Coupling of spin and angular momentum of light in plasmonic vortex

Seong-Woo Cho, Junghyun Park, Seung-Yeol Lee, Hwi Kim, and Byoungho Lee  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 10083-10094 (2012)
http://dx.doi.org/10.1364/OE.20.010083


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Abstract

We present that two distinct optical properties of light, the spin angular momentum (SAM) and the orbital angular momentum (OAM), can be coupled in the plasmonic vortex. If a plasmonic vortex lens (PVL) is illuminated by the helical vector beam (HVB) with the SAM and OAM, then those distinct angular momenta contribute to the generation of the plasmonic vortex together. The analytical model reveals that the total topological charge of the generated plasmonic vortex is given by a linear summation of those of the SAM and OAM, as well as the geometric charge of the PVL. The generation of the plasmonic vortex and the manipulation of the fractional topological charge are also presented.

© 2012 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(050.4865) Diffraction and gratings : Optical vortices
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 12, 2012
Revised Manuscript: April 7, 2012
Manuscript Accepted: April 10, 2012
Published: April 18, 2012

Citation
Seong-Woo Cho, Junghyun Park, Seung-Yeol Lee, Hwi Kim, and Byoungho Lee, "Coupling of spin and angular momentum of light in plasmonic vortex," Opt. Express 20, 10083-10094 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-10083


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