High efficiency electro-optic polymer/ TiO2 waveguide modulators

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this work, we have demonstrated a phase modulator and a ring resonator modulator by using a thin TiO2 and electrooptic (EO) polymer derived hybrid waveguide structure. This TiO2 layer enables the modulators to be constituted without a top cladding, and also can enhance in-device EO coefficient from 70 to 120 pm/V. We utilized the high refractive index TiO 2 to confine a large fraction of light in the relatively low refractive index EO polymer layer. As a result, the phase modulator has a VπL of 3.3 Vcm, corresponding to 1.65 Vcm in a push-pull Mach-Zehnder interferometer structure. For the ring modulator, the resonance was observed to shift by 0.02 nm/V, and a modulation depth of 3dB was observed at the frequency response function at 20 kHz using 2 Vp-p clock signal.

Original languageEnglish
Title of host publicationOptical Processes in Organic Materials and Nanostructures II
Publication statusPublished - 2013
EventOptical Processes in Organic Materials and Nanostructures II - San Diego, CA, United States
Duration: Aug 25 2013Aug 28 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical Processes in Organic Materials and Nanostructures II
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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