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Optical Limiting in Phthalocyanine Solutions and in Pure Liquid Phthalocyanines

Published online by Cambridge University Press:  03 September 2012

Steven R. Flom
Affiliation:
Code 5613, Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
Richard G. S. Pong
Affiliation:
Code 5613, Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
James S. Shirk
Affiliation:
Code 5613, Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
F. J. Bartoli
Affiliation:
Code 5613, Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
R. F. Cozzens
Affiliation:
Chemistry Division U.S. Naval Research Laboratory, Washington, DC 20375
Michael E. Boyle
Affiliation:
Chemistry Division U.S. Naval Research Laboratory, Washington, DC 20375
Arthur W. Snow
Affiliation:
Chemistry Division U.S. Naval Research Laboratory, Washington, DC 20375
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Abstract

Optical limiting, degenerate four-wave mixing and transient absorption experiments have been performed on a neat liquid lead substituted phthalocyanine. The photophysical mechanisms responsible for the good optical limiting observed in other phthalocyanine solutions are maintained in this pure liquid despite its different peripheral substitution pattern. The liquid is shown to have excited state absorption cross sections that exceed those of the ground state through much of the visible spectrum. Hybrid absorptive/refractive nonlinear response is demonstrated to contribute to both the four-wave mixing and optical limiting response. The mechanism and states responsible are discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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