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Proceedings Paper

Giant optical nonlinearities of fractal colloid aggregates
Author(s): Robert L. Armstrong; Vladimir P. Safonov; Nikolay N. Lepeshkin; Won-Tae Kim; Vladimir M. Shalaev
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Paper Abstract

Strong fluctuations oflocal fields may result in huge enhancements ofoptical nonlinearities in metal fractal colloid aggregates. Giant enhancement ofthird order nonlinearities was calculated and obtained experimentally. The real and imaginary parts of the cubic susceptibility of silver colloid aggregates were measured. It was found that the coefficient of nonlinear absorption depends on laser wavelength and intensity strongly. An optical limiting in silver colloid was observed.

Paper Details

Date Published: 10 October 1997
PDF: 9 pages
Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); doi: 10.1117/12.279300
Show Author Affiliations
Robert L. Armstrong, New Mexico State Univ. (United States)
Vladimir P. Safonov, New Mexico State Univ. and Institute of Automation and Electrometry (Russia)
Nikolay N. Lepeshkin, New Mexico State Univ. (United States)
Won-Tae Kim, New Mexico State Univ. (United States)
Vladimir M. Shalaev, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 3146:
Nonlinear Optical Liquids and Power Limiters
Christopher M. Lawson, Editor(s)

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