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Novel Hybrid Covalent / Ionic Self-Assembly Technique for Improved Second-Order Nonlinear Optical Films

Published online by Cambridge University Press:  15 March 2011

P. J. Neyman ,
M. Guzy ,
S. M. Shah ,
R.M. Davis ,
K. E. VanCott ,
H. Wang ,
H. W. Gibson ,
C. Brands  and
J.R. Heflin
P. J. Neyman
Affiliation:
Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061
M. Guzy
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
S. M. Shah
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
R.M. Davis
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
K. E. VanCott
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
H. Wang
Affiliation:
Department of Chemistry, Virginia Tech, Blacksburg, VA 24061
H. W. Gibson
Affiliation:
Department of Chemistry, Virginia Tech, Blacksburg, VA 24061
C. Brands
Affiliation:
Department of Physics, Virginia Tech, Blacksburg, VA 24061
J.R. Heflin
Affiliation:
Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061 Department of Physics, Virginia Tech, Blacksburg, VA 24061
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Abstract

Ionically self-assembled monolayer (ISAM) films have been shown to spontaneously produce noncentrosymmetric ordering that gives rise to a substantial second order nonlinear optical (NLO) response. Typically, the ISAM films for NLO response are an assemblage of bilayers of oppositely charged polymers whose thickness can be controlled through variation of pH and ionic strength of the immersion solutions. Here, we investigate the effects of replacing the NLO-active polymer layers with layers of monomeric chromophores containing ionic and covalent bonding sites. Films fabricated exclusively using polyelectrolytes contain some fraction of both randomly oriented and anti-parallel oriented chromophores. We have examined the incorporation of monomeric chromophores into ISAM films in order to increase the net polar orientation of the chromophores and reduce bilayer thickness.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 708: Symposium BB – Organic Optoelectronic Materials, Processing and Devices , 2001 , BB4.4
Copyright
Copyright © Materials Research Society 2002

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References

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