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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 6 — Mar. 17, 2008
  • pp: 3924–3930

Refracting surface plasmon polaritons with nanoparticle arrays

Ilya P. Radko, Andrey B. Evlyukhin, Alexandra Boltasseva, and Sergey I. Bozhevolnyi  »View Author Affiliations


Optics Express, Vol. 16, Issue 6, pp. 3924-3930 (2008)
http://dx.doi.org/10.1364/OE.16.003924


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Abstract

Refraction of surface plasmon polaritons (SPPs) by various structures formed by a 100-nm-period square lattice of gold nanoparticles on top of a gold film is studied by leakage radiation microscopy. SPP refraction by a triangular-shaped nanoparticle array indicates that the SPP effective refractive index increases inside the array by a factor of ~1.08 (for the wavelength 800 nm) with respect to the SPP index at a flat surface. Observations of SPP focusing and deflection by circularly shaped areas as well as SPP waveguiding inside rectangular arrays are consistent with the SPP index increase deduced from the SPP refraction by triangular arrays. The SPP refractive index is found to decrease slightly for longer wavelengths within the wavelength range of 700–860 nm. Modeling based on the Green’s tensor formalism is in a good agreement with the experimental results, opening the possibility to design nanoparticle arrays for specific applications requiring in-plane SPP manipulation.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 20, 2007
Revised Manuscript: March 3, 2008
Manuscript Accepted: March 6, 2008
Published: March 10, 2008

Citation
Ilya P. Radko, Andrey B. Evlyukhin, Alexandra Boltasseva, and Sergey I. Bozhevolnyi, "Refracting surface plasmon polaritons with nanoparticle arrays," Opt. Express 16, 3924-3930 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-6-3924


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