Open AccessUnprecedented highest electro-optic coefficient of 226 pm/V for electro-optic polymer/TiO2 multilayer slot waveguide modulators
Author(s) -
Youssef Jouane,
Y.C. Chang,
D. Zhang,
Jingdong Luo,
Alex K.Y. Jen,
Yasufumi Enami
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.027725
Subject(s) - materials science , cladding (metalworking) , pockels effect , optics , polymer , thin film , optoelectronics , wavelength , refractive index , coating , waveguide , electro optics , titanium dioxide , laser , composite material , nanotechnology , physics
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.