Abstract
Aromatic polyurea-based waveguides were fabricated by the evaporation and deposition of a diamino monomer and a diisocyanate monomer onto an indium tin oxide (ITO) glass substrate in a vacuum chamber. The nonlinear I– V behaviors of the polyurea film were characterized in situ during poling. Fourier transform infrared spectroscopy and the heterodyne Mach–Zehnder interference (HMZI) technique were applied to explore the electro-optic performance of the polyurea polymeric waveguide induced by an applied electric field. The Pockels coefficients were measured by a heterodyne Mach–Zehnder interference (HMZI) system to be γ 13=7.1 and γ 33=21.9 pm/V, for the TE and TM polarizations, respectively.
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