In our previous work we demonstrated a 3X increase in the nonlinearity, or electro-optic (EO) coefficient of the nonlinear optic (NLO) polymer disperse red 1:Polymethylmethacrylate (DR1: PMMA) by introducing a thin guanine nucleobase interfacial buffer layer, deposited between the NLO polymer and the cathode and a thin bathocuproine (BCP) interfacial buffer layer, deposited between the NLO polymer and the anode, being poled at 100 V/μm. In addition, we observed a 40% increase in EO coefficient by depositing either a thin sol-gel derived titanium dioxide layer or a thin guanine layer on either the anode or cathode side of the structure, poling at 100 V/μm. This paper addresses our analysis of these differences and is based on surface resistance.
Fahima Ouchen, Emily Heckman, Larry Dalton, François Kajzar, Ileana Rau, and James Grote, "Effect of charge carrier blocking layers on poling nonlinear optic polymers," Proc. SPIE 9928, Nanobiosystems: Processing, Characterization, and Applications IX, 992802 (Presented at SPIE Nanoscience + Engineering: August 28, 2016; Published: 18 October 2016); https://doi.org/10.1117/12.2238813.
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