Publisher DOI: 10.1364/OME.5.001653
Title: Mechanism that governs the electro-optic response of second-order nonlinear polymers on silicon substrates
Language: English
Authors: Schulz, Kai Marvin 
Prorok, Stefan 
Jalas, Dirk 
Marder, Seth R. 
Luo, Jingdong 
Jen, Alex K.-Y. 
Zierold, Robert 
Nielsch, Kornelius 
Eich, Manfred 
Issue Date: 1-Jul-2015
Publisher: OSA
Source: Optical Materials Express 8 (5): 1653-1660 (2015)
Abstract (english): 
We use a modified Teng-Man technique to investigate the poling induced electro-optic activity of chromophore-doped organic polymers poled on silicon substrate in a thin film sample configuration. We reveal a fundamental difference between the poling processes on silicon substrate and ITO substrate. The electro-optic activity for polymers poled on silicon substrate is reduced which we ascribe to space charge formation at the silicon - organic interface that distorts the field distribution in the polymer film during high field poling, and therefore limits the effective induced polar order. We demonstrate that the electro-optic activity on silicon substrate can be improved by inserting a 5 nm thin dielectric layer of Al2O3q between the silicon substrate and the polymer which reduces the leakthrough current during poling, thereby allowing for higher applicable poling voltages.
ISSN: 2159-3930
Journal: Optical materials express 
Institute: Optische und Elektronische Materialien E-12 
Document Type: Article
More Funding information: German Research Fondation (DFG) via FOR 653
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