19 May 2000 Acentric nonlinear optical films by alternating polyelectrolyte deposition
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Proceedings Volume 3939, Organic Photonic Materials and Devices II; (2000) https://doi.org/10.1117/12.386379
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States
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.
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M. Joseph Roberts, M. Joseph Roberts, Warren N. Herman, Warren N. Herman, "Acentric nonlinear optical films by alternating polyelectrolyte deposition", Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386379; https://doi.org/10.1117/12.386379
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