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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 24 — Nov. 19, 2012
  • pp: 26299–26307

Hybrid spiral plasmonic lens: towards an efficient miniature circular polarization analyzer

Weibin Chen, Guanghao Rui, Don C. Abeysinghe, Robert L. Nelson, and Qiwen Zhan  »View Author Affiliations


Optics Express, Vol. 20, Issue 24, pp. 26299-26307 (2012)
http://dx.doi.org/10.1364/OE.20.026299


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Abstract

A hybrid spiral plasmonic lens that consists of alternating spiral slot and spiral triangular sub-aperture array can differentiate circular polarization of different handedness and enable a miniature circular polarization analyzer design with high efficiency. The improved performance compared to pure spiral slot lens comes from the fact that the hybrid lens is capable of focusing both the radial and the azimuthal polarization components of a circular polarization, doubling the coupling efficiency. In this paper, the spin-dependent plasmonic focusing properties of a spatially arranged triangular sub-aperture array and a hybrid spiral plasmonic lens are demonstrated using a collection mode near field scanning optical microscope. The coupling efficiency could be further improved through optimizing the geometry of the hybrid lens.

© 2012 OSA

OCIS Codes
(230.5440) Optical devices : Polarization-selective devices
(240.6680) Optics at surfaces : Surface plasmons
(260.5430) Physical optics : Polarization
(110.5405) Imaging systems : Polarimetric imaging
(260.6042) Physical optics : Singular optics

ToC Category:
Optical Devices

History
Original Manuscript: September 18, 2012
Revised Manuscript: October 31, 2012
Manuscript Accepted: November 1, 2012
Published: November 7, 2012

Citation
Weibin Chen, Guanghao Rui, Don C. Abeysinghe, Robert L. Nelson, and Qiwen Zhan, "Hybrid spiral plasmonic lens: towards an efficient miniature circular polarization analyzer," Opt. Express 20, 26299-26307 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-24-26299


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References

  1. W. Chen, D. C. Abeysinghe, R. L. Nelson, and Q. Zhan, “Plasmonic lens made of multiple concentric metallic rings under radially polarized illumination,” Nano Lett.9(12), 4320–4325 (2009). [CrossRef] [PubMed]
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  10. W. Chen, R. L. Nelson, and Q. Zhan, “Geometrical phase and surface plasmon focusing with azimuthal polarization,” Opt. Lett.37(4), 581–583 (2012). [CrossRef] [PubMed]
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