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Reverse saturable Absorption in Organically Doped Xerogels

Published online by Cambridge University Press:  03 September 2012

M. Brunel ,
F. Chaput ,
S. A. Vinogradov ,
B. Campagne ,
M. Canva ,
J-P. Boilot  and
A. Brun
M. Brunel
Affiliation:
Groupe d'Optique Non Linéaire, Institut d'Optique Théorique et Appliquée, URA CNRS 14, Bât. 503, B.P. 147, 91403 Orsay (FRANCE).
F. Chaput
Affiliation:
Groupe de Chimie du Solide, Laboratoire de Physique de la Matière Condensée, URA CNRS 1254D, Ecole Polytechnique, 91128 Palaiseau (France)
S. A. Vinogradov
Affiliation:
Department of Biochemistry and Biophysics, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 (USA)
B. Campagne
Affiliation:
Groupe d'Optique Non Linéaire, Institut d'Optique Théorique et Appliquée, URA CNRS 14, Bât. 503, B.P. 147, 91403 Orsay (FRANCE).
M. Canva
Affiliation:
Groupe d'Optique Non Linéaire, Institut d'Optique Théorique et Appliquée, URA CNRS 14, Bât. 503, B.P. 147, 91403 Orsay (FRANCE).
J-P. Boilot
Affiliation:
Groupe de Chimie du Solide, Laboratoire de Physique de la Matière Condensée, URA CNRS 1254D, Ecole Polytechnique, 91128 Palaiseau (France)
A. Brun
Affiliation:
Groupe d'Optique Non Linéaire, Institut d'Optique Théorique et Appliquée, URA CNRS 14, Bât. 503, B.P. 147, 91403 Orsay (FRANCE).
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Abstract

Pd and Zn - tetraphenyltetrabenzoporphyrins (PdTPTBP and ZnTPTBP), hexacyanin 3 (HITCI), and substituted phthalocyanines were incorporated in solid-state matrices (xerogels) using a sol-gel process. Nonlinear reverse saturable absorption was observed with those materials when they were illuminated with nanosecond laser pulses at 532 nm, or other wavelengths in the visible spectrum (between 450 nm and 630 nm). PdTPTBP doped xerogels exhibit a nonlinear activation threshold of about 10 mJ/cm , which is much lower than the value of 80 mJ/cm2 obtained under similar conditions with classical Al phthalocyanine chloride, or HITCI molecules. Solid state “red active” reverse saturable absorbers can be obtained with substituted phthalocyanines doped xerogels. The different experimental results are discussed using classical 4- energy level diagrams.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 479: Symposium S – Materials for Optical Limiting II , 1997 , 97
Copyright
Copyright © Materials Research Society 1997

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