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Proceedings Paper

Acentric nonlinear optical films by alternating polyelectrolyte deposition
Author(s): M. Joseph Roberts; Warren N. Herman
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Paper Abstract

Alternating polyelectrolyte deposition (APD) is a room temperature process that can produce noncentrosymmetric ordered films of nonlinear optical polymers (NLOP). Previous studies using a stilbazolium-substituted polyepichlorohydrin (SPECH) as the NLO-active polycation exhibited a saturation of the SHG signal independent of the number of deposited layers. This saturation effect was thought to be due a change in the charge density in the outermost layers. The charge density is the main driving force for chromophore alignment. In this study, NLO-inactive spacer layers were used to regenerate the charge density before continuing with deposition of NLO-active layers. The overall SHG signal from these 'multi-deck sandwich' films was higher than previously obtainable with SPECH as the NLO-active material. The surface morphology, roughness, and film thickness have been characterized by Tapping Mode Atomic Force Microscopy.

Paper Details

Date Published: 19 May 2000
PDF: 5 pages
Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386379
Show Author Affiliations
M. Joseph Roberts, Naval Air Warfare Ctr. (United States)
Warren N. Herman, Naval Air Warfare Ctr. (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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