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Subwavelength Localization of Optical Modes in Fractals

Published online by Cambridge University Press:  15 February 2011

Vladimir Shalaev ,
R. Botet  and
M. Moskovits
Vladimir Shalaev
Affiliation:
Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003
R. Botet
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, Centre d'Orsay, 91405 Orsay CEDEX, France
M. Moskovits
Affiliation:
Ontario Laser and Lightwave Research Centre, and Department of Chemistry, University of Toronto, M5S 1A1, Canada
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Abstract

Resonant optical excitation of fractal clusters generates dipolar eigenmodes which are extremely localized within areas much smaller than the wavelength. The localization occurs due to the fractal morphology and accounts for the very high local fields leading to the huge enhancement of various optical effects. In particular, Rayleigh and Raman light scattering and, especially, nonlinear optical processes, such as 2-photon photoemission and degenerate four-wave mixing, are strongly enhanced in fractal clusters. The spatial distribution of the modes shows the frequency and polarization selectivity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 351: Symposium V – Molecularly Designed Ultrafine/Nanostructured Materials , 1994 , 449
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCES

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