Bragg Reflector Waveguide and Electro-Optic Modulator Based on Barium Titanate Epitaxial Thin Films
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We report the nanofabrication of Bragg reflector waveguide structure based on a barium titanate (BTO) epitaxial thin film grown on MgO substrate and characterized its optical transmission. Low pressure nano-lithography was used for the formation of Bragg reflector waveguide structure. We demonstrate that there is sufficient refractive index contrast to form a well-defined stop band by forming gratings in a top strip layer of Si3N4 that was grown on BaTiO3 (BTO) thin film. Simulations of the optical transmission and stop band of TE mode, and electro-optic (EO) modulator tunability are also discussed. The non-linear photonic crystal waveguides are potentially suitable as tunable optical filters and ultra-wide bandwidth modulators. © 2007 Materials Research Society.
author list (cited authors)
Liu, Z., Lin, P., & Wessels, B. W.