Electro-optic polymer/TiO2 multilayer slot waveguide modulators

• DOI: 10.1063/1.4754597
• Publication Date: 2012-09-21T23:01:21Z
• Authors: Y. Enami; B. Yuan; M. Tanaka; J. Luo; A. K.-Y. Jen
• Keywords: 0103 physical sciences; 01 natural sciences

We report an all-dielectric electro-optic (EO) polymer/TiO2 multilayer slot waveguide modulator with low optical insertion loss for high-speed operations. The EO polymer is sandwiched between thin TiO2 slot waveguide films to improve mode confinement in the EO polymer. The structure increased the mode confinement in the TiO2 and EO polymer slot layers and reduced the electrode distance between the Au electrodes without introducing optical loss from the metal electrodes. The half-wave voltage of the modulator was 6.5 V for a 5-mm-long electrode at a wavelength of 1550 nm. The half-wave voltage and length product was 3.25 V·cm.