Optical Properties of Nanostructured Random Media

Volume 82 of the series Topics in Applied Physics pp 93-114


Optical Nonlinearities of Fractal Composites

  • Vladimir M. ShalaevAffiliated withSchool of Electrical and Computer Engeneering, Purdue University

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A theory of optical responses in fractal nanostructured composite materials is outlined. It is shown that the fractal geometry results in localization of plasmon excitations in the “hot” spots, where the local field can exceed the applied field by several orders of magnitude. The high local fields of the localized fractal modes result in dramatic enhancement of optical responses, making surface-enhanced spectroscopy of single molecules and nanocrystals feasible.