1.
Opt Express
; 22(22): 27725-32, 2014 Nov 03.
Article
in English
| MEDLINE
| ID: mdl-25401916
ABSTRACT
We investigated the electrical properties and optical quality of two layers a titanium dioxide (TiO2) selective layer and a sol-gel silica cladding layer for use as coating layers for nonlinear optic (NLO) polymers in electro-optic (EO) polymer/TiO2 multilayer slot waveguide modulators. We used a simple ellipsometric reflective technique developed by Teng and Man to measure the electro-optic (EO) coefficients of poled thin films of an EO polymer in an EO multilayer device. The Pockels coefficient was enhanced up to 226 and 198 pm/V at wavelengths of 1.31 and 1.55 µm, respectively, when optimally poled with TiO2 and a sol-gel silica cladding.