Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Quadratic electroabsorption studies of third-order susceptibility mechanisms in dye-doped polymers

Not Accessible

Your library or personal account may give you access

Abstract

We apply quadratic electroabsorption to thin-film solid solutions of squarylium dye molecules in poly(methyl methacrylate) polymer to study the electronic and reorientational mechanisms in the third-order nonlinear-optical susceptibility. To interpret the data, we have generalized quadratic electro-optic response theory to include both electronic and hindered-molecular-reorientation mechanisms. Such a theory predicts that the ratio of two independent third-order susceptibility tensor components, namely, χ3333(3)/χ1133(3), characterizes the relative contribution of each mechanism. We have designed and built an experiment that measures this ratio as a function of temperature and wavelength. Results show that at room temperature and near the first electronic transition wavelength the response is dominated by the electronic mechanism and that the reorientational contribution dominates when the sample is heated above its glass-transition temperature. Furthermore, far off resonance, the sign of the imaginary part of the third-order susceptibility is positive and is consistent with the two-level model. We also discuss the possible role of electrostriction in our analysis. Quadratic electroabsorption is thus shown to be a versatile tool for measuring the imaginary part of the third-order nonlinear-optical susceptibility, which yields information about the role of the interaction of the polymer host with the dopant molecule

© 1994 Optical Society of America

Full Article  |  PDF Article
More Like This
Characterization of the excited states of a squaraine molecule with quadratic electroabsorption spectroscopy

C. Poga, T. M. Brown, M. G. Kuzyk, and Carl W. Dirk
J. Opt. Soc. Am. B 12(4) 531-543 (1995)

Mechanisms of quadratic electro-optic modulation of dye-doped polymer systems

M. G. Kuzyk, J. E. Sohn, and C. W. Dirk
J. Opt. Soc. Am. B 7(5) 842-858 (1990)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (49)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved