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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
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
Copyright
Copyright © Materials Research Society 1997

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