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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S2 — Mar. 14, 2011
  • pp: A146–A156

Resonant SPP modes supported by discrete metal nanoparticles on high-index substrates

F. J. Beck, E. Verhagen, S. Mokkapati, A. Polman, and K. R. Catchpole  »View Author Affiliations


Optics Express, Vol. 19, Issue S2, pp. A146-A156 (2011)
http://dx.doi.org/10.1364/OE.19.00A146


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Abstract

We provide a new physical interpretation of scattering from plasmonic nanoparticles on high-index substrates. We demonstrate the excitation of different types of resonant modes on disk-shaped, Ag nanoparticles. At short wavelengths, the resonances are localised at the top of the particle, while at longer wavelengths they are localised at the Ag/substrate interface. We attribute the long wavelength resonances to geometric resonances of surface plasmon polaritons (SPPs) at the Ag/substrate interface. We show that particles that support resonant SPP modes have enhanced scattering cross-sections when placed directly on a high-index substrate; up to 7.5 times larger than that of a dipole scatterer with an equivalent free-space resonance. This has implications for designing scattering nanostructures for light trapping solar cells.

© 2011 OSA

OCIS Codes
(350.6050) Other areas of optics : Solar energy

ToC Category:
Plasmonics

History
Original Manuscript: November 29, 2010
Revised Manuscript: January 21, 2011
Manuscript Accepted: January 21, 2011
Published: February 4, 2011

Citation
F. J. Beck, E. Verhagen, S. Mokkapati, A. Polman, and K. R. Catchpole, "Resonant SPP modes supported by discrete metal nanoparticles on high-index substrates," Opt. Express 19, A146-A156 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-S2-A146


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