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Enhanced Second Order Nonlinear Optical Susceptibilities in Ionically Self-Assembled Films Incorporating Dianionic Molecules

Published online by Cambridge University Press:  21 March 2011

P.J. Neyman ,
M.T. Guzy ,
S. Shah ,
K.E. Van Cott ,
R.M. Davis ,
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.T. Guzy
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
S. Shah
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
K.E. Van Cott
Affiliation:
Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061
R.M. Davis
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 recently 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 study the effects of replacing the NLO-active polymer layers with layers of dianionic molecules. Films fabricated exclusively using polyelectrolytes contain some fraction of both randomly oriented and anti-parallel oriented chromophores. The incorporation of dianionic molecules within the ISAM films affords greater χ(2) due to increased net polar orientation of the chromophores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 660: Symposia JJ – Organic Electronic & Photonic Materials and Devices , 2000 , JJ8.30
Copyright
Copyright © Materials Research Society 2001

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References

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