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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 9 — Apr. 25, 2011
  • pp: 8506–8513

Absorption enhancement by matching the cross-section of plasmonic nanowires to the field structure of tightly focused beams

Alexander Normatov, Boris Spektor, Yehuda Leviatan, and Joseph Shamir  »View Author Affiliations


Optics Express, Vol. 19, Issue 9, pp. 8506-8513 (2011)
http://dx.doi.org/10.1364/OE.19.008506


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Abstract

Nanostructured materials, designed for enhanced light absorption, are receiving increased scientific and technological interest. In this paper we propose a physical criterion for designing the cross-sectional shape of plasmonic nanowires for improved absorption of a given tightly focused illumination. The idea is to design a shape which increases the matching between the nanowire plasmon resonance field and the incident field. As examples, we design nanowire shapes for two illumination cases: a tightly focused plane wave and a tightly focused beam containing a line singularity. We show that properly shaped and positioned silver nanowires that occupy a relatively small portion of the beam-waist area can absorb up to 65% of the total power of the incident beam.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(290.5850) Scattering : Scattering, particles

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 4, 2011
Revised Manuscript: March 27, 2011
Manuscript Accepted: March 28, 2011
Published: April 18, 2011

Virtual Issues
Vol. 6, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Alexander Normatov, Boris Spektor, Yehuda Leviatan, and Joseph Shamir, "Absorption enhancement by matching the cross-section of plasmonic nanowires to the field structure of tightly focused beams," Opt. Express 19, 8506-8513 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-9-8506


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