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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16224–16233

Wedge nanostructures for plasmonic nanofocusing

D. Garoli, P. Zilio, M. Natali, M. Carli, F. Enrichi, and F. Romanato  »View Author Affiliations

Optics Express, Vol. 20, Issue 15, pp. 16224-16233 (2012)

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We report numerical and experimental results on the optical response of transparent metal coated wedges arrays for plasmonic nanofocusing. Light normally impinging from the dielectric side is coupled to Surface Plasmon Polaritons (SPPs) at the oblique metal-air interfaces. A dielectric phase shifter has been implemented in the structure in order to allow constructive interference of SPPs at the wedge apex. Finite Elements simulations were used to design the system. Focused Ion Beam (FIB) milling, chemical etching and replica molding were used for the fabrication. NSOM and Raman measurements demonstrate that plasmonic nanofocusing actually takes place in the structure.

© 2012 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(220.4241) Optical design and fabrication : Nanostructure fabrication
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: April 30, 2012
Revised Manuscript: May 25, 2012
Manuscript Accepted: June 2, 2012
Published: July 2, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

D. Garoli, P. Zilio, M. Natali, M. Carli, F. Enrichi, and F. Romanato, "Wedge nanostructures for plasmonic nanofocusing," Opt. Express 20, 16224-16233 (2012)

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