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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 10 — Oct. 1, 1999
  • pp: 1824–1832

Linear optical properties of gold nanoshells

Richard D. Averitt, Sarah L. Westcott, and Naomi J. Halas  »View Author Affiliations


JOSA B, Vol. 16, Issue 10, pp. 1824-1832 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001824


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Abstract

A metal nanoshell consists of a nanometer-scale dielectric core surrounded by a thin metallic shell. The plasmon resonance of metal nanoshells displays a geometric tunability controlled by the ratio of the core radius to the total radius. For gold-coated Au2S this ratio varies from 0.6 to 0.9, yielding a plasmon resonance tunable from 600 to greater than 1000 nm. Mie scattering theory for the nanoshell geometry quantitatively accounts for the observed plasmon resonance shifts and linewidths. In addition, the plasmon linewidth is shown to be dominated by electron surface scattering.

© 1999 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(260.5740) Physical optics : Resonance
(290.3700) Scattering : Linewidth
(290.4020) Scattering : Mie theory

Citation
Richard D. Averitt, Sarah L. Westcott, and Naomi J. Halas, "Linear optical properties of gold nanoshells," J. Opt. Soc. Am. B 16, 1824-1832 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-10-1824

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