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Electrostatic Self-Assembly of Multilayer Noncentrosymmetric Thin Films and Devices

Published online by Cambridge University Press:  10 February 2011

K. M. Lenahan ,
T. Zenga ,
Y. Liu ,
Y.-X. Wang ,
W. Zhao  and
R.O. Claus
K. M. Lenahan
Affiliation:
Fiber & Electro-Optic Research Center, Virginia Polytechnic Institute & State University, Blacksburg, Virginia
T. Zenga
Affiliation:
Fiber & Electro-Optic Research Center, Virginia Polytechnic Institute & State University, Blacksburg, Virginia
Y. Liu
Affiliation:
NanoSonic, Inc., P.O. Box 618, Christiansburg, Virginia
Y.-X. Wang
Affiliation:
Fiber & Electro-Optic Research Center, Virginia Polytechnic Institute & State University, Blacksburg, Virginia
W. Zhao
Affiliation:
Fiber & Electro-Optic Research Center, Virginia Polytechnic Institute & State University, Blacksburg, Virginia
R.O. Claus
Affiliation:
Fiber & Electro-Optic Research Center, Virginia Polytechnic Institute & State University, Blacksburg, Virginia
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Abstract

The electrostatic self-assembly of multilayer thin films by alternate adsorption from polyelectrolyte solutions spontaneously leads to the formation of noncentrosymmetric structures if the molecules themselves have net dipole moments. Significant second-order nonlinear optical susceptibility has been observed in such films, using both commercially available chromophores and molecules specifically designed to yield an enhanced net dipole moment. Recent results indicate the capability to fabricate piezoelectric films using the same method. The nature of the deposition process results in an alignment of the chromophores that is stable over time and to temperatures up to 150°C, in contrast with poled polymers. ESA films offer the additional major advantages of excellent homogeneity and low optical loss, high thermal and chemical stability, and low cost.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 561: Symposium F – Organic Nonlinear Optical Materials and Devices , 1999 , 111
Copyright
Copyright © Materials Research Society 1999

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References

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