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Non-Linear Optical Characteristics of Novel Porphyrin Dye Media

Published online by Cambridge University Press:  03 September 2012

K. J. McEwan ,
J. M. Robertson ,
A. P. Wylie  and
H. L. Anderson
K. J. McEwan
Affiliation:
Defence Research Agency, Malvem, U.K.
J. M. Robertson
Affiliation:
Defence Research Agency, Malvem, U.K.
A. P. Wylie
Affiliation:
The Dyson Perrins Laboratory, University of Oxford, U.K.
H. L. Anderson
Affiliation:
The Dyson Perrins Laboratory, University of Oxford, U.K.
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Abstract

Measurements of sensitive RSA phenonema in new porphyrin dyes are presented. Both the linear and non-linear optical properties are shown to depend strongly on the molecular structure. A detailed analysis of two of the porphyrins reveals that inter-systems crossing rate and the excited state absorption profile are strongly influenced by substitution of a heavy atom into the central atom position. It is shown that by appropriate choice of wavelength values in excess of 30 can be achieved for the material parameter σex / σgr. This value compares well with previously reported results and is achieved in conjunction with excited state lifetimes on the order of 300 ns.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 479: Symposium S – Materials for Optical Limiting II , 1997 , 29
Copyright
Copyright © Materials Research Society 1997

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