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Proceedings Paper

Thermal stability and immersion solution dependence of second-order nonlinear optical ionically self-assembled films
Author(s): Charles Figura; Patrick J. Neyman; Daniela Marciu; Charles Brands; Mandy Amanda Murray; Steve Hair; Rick M. Davis; Michael B. Miller; James Randy Heflin
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Paper Abstract

Polymeric films fabricated from ionically self-assembled monolayers (ISAMs) spontaneously from in a noncentrosymmetric structure requisite for a nonzero second order nonlinear optical (NLO) susceptibility, (chi) (2), without the need for electric field poling. ISAM NLO films exhibit excellent long-term temporal stability of (chi) (2), having shown no decay over a period of nearly three years. They are also remarkably stable at elevated temperatures. While (chi) (2) decreases by 20 percent as the temperature is raised to 150 degrees C, total recovery of the susceptibility is observed upon cooling, demonstrating that the decrease is not due to an irreversible randomization of the chromophore alignment. The thickness, orientational order, and NLO response are found to be strongly dependent on the pH and ionic strength of the solutions form which the films are deposited. The largest (chi) (2) values are observed in films with the smallest bilayer thickness. This suggests that polar orientation is obtained primarily at the interfaces between adjacent layers rather than throughout a full monolayer.

Paper Details

Date Published: 19 May 2000
PDF: 9 pages
Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386378
Show Author Affiliations
Charles Figura, Virginia Polytechnic Institute and State Univ. (United States)
Patrick J. Neyman, Virginia Polytechnic Institute and State Univ. (United States)
Daniela Marciu, Luna Innovations, Inc. (United States)
Charles Brands, Virginia Polytechnic Institute and State Univ. (United States)
Mandy Amanda Murray, Virginia Polytechnic Institute and State Univ. (United States)
Steve Hair, Virginia Polytechnic Institute and State Univ. (United States)
Rick M. Davis, Virginia Polytechnic Institute and State Univ. (United States)
Michael B. Miller, Luna Innovations, Inc. (United States)
James Randy Heflin, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 3939:
Organic Photonic Materials and Devices II
Donal D. C. Bradley; Bernard Kippelen, Editor(s)

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