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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 13 — Jun. 21, 2010
  • pp: 14079–14086

Efficient coupling and field enhancement for the nano-scale: plasmonic needle

Alexander Normatov, Pavel Ginzburg, Nikolai Berkovitch, Gilad M. Lerman, Avner Yanai, Uriel Levy, and Meir Orenstein  »View Author Affiliations


Optics Express, Vol. 18, Issue 13, pp. 14079-14086 (2010)
http://dx.doi.org/10.1364/OE.18.014079


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Abstract

Theoretical demonstration of efficient coupling and power concentration of radially-polarized light on a conical tip of plasmonic needle is presented. The metallic needle is grown at the center of radial plasmonic grating, engraved in a metal surface. The electromagnetic field distribution was evaluated by Finite Elements and Finite-Difference-Time-Domain methods. The results show that the field on the tip of the needle is significantly enhanced compared to the field impinging on the grating. The power enhancement exhibited a resonant behavior as a function of needle length and reached values of ~104. Test samples for few types of characterization schemes were fabricated.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optics at Surfaces

History
Original Manuscript: May 4, 2010
Revised Manuscript: June 2, 2010
Manuscript Accepted: June 4, 2010
Published: June 15, 2010

Citation
Alexander Normatov, Pavel Ginzburg, Nikolai Berkovitch, Gilad M. Lerman, Avner Yanai, Uriel Levy, and Meir Orenstein, "Efficient coupling and field enhancement for the nano-scale: plasmonic needle," Opt. Express 18, 14079-14086 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-13-14079


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