Low-voltage drive electro-optic Pb(Zr,Ti)O3 waveguide devices fabricated by solid-phase epitaxy

Keiichi Nashimoto; Shigetoshi Nakamura; Hiroaki Moriyama; Masao Watanabe; Eisuke Osakabe; Takashi Morikawa

doi:10.1117/12.343724

26 March 1999 Low-voltage drive electro-optic Pb(Zr,Ti)O₃ waveguide devices fabricated by solid-phase epitaxy

Keiichi Nashimoto, Shigetoshi Nakamura, Hiroaki Moriyama, Masao Watanabe, Eisuke Osakabe, Takashi Morikawa

Proceedings Volume 3620, Integrated Optics Devices III; (1999) https://doi.org/10.1117/12.343724
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

Pb(Zr,Ti)O₃ (PZT) thin film optical waveguides were grown on Nb-doped SrTiO₃(100) substrates by solid-phase epitaxy to fabricate an electrode/waveguide/semiconductor structure. The substrates were spin-coated with methoxyethoxide precursor solutions and preannealed to form amorphous thin films followed by the solid-phase epitaxial crystallization of the thin films above 650 degrees Celsius. The grown epitaxial PZT waveguides had a single perovskite phase and a single (001) orientation. The propagation loss was reduced to 1.7 dB/cm by introducing an epitaxial buffer layer between the PZT waveguide and the Nb-doped SrTiO₃ substrate. An electro- optic beam deflector was fabricated by sputtering an ITO prism electrode on the surface of the waveguide. Efficient laser beam deflection larger than 10 mrad was observed by applying 5 V between the prism electrode and the substrate. An index change higher than 0.001 at 5 V and an effective electro-optic coefficient larger than 40 pm/V were estimated from the deflection characteristic. For integrating the electro-optic PZT waveguide devices with passive waveguide components, channel waveguides and waveguide lenses were also fabricated in the PZT waveguides using a simple wet-etching process. These achievements suggest the realization of variety of low- voltage drive integrated waveguide devices including matrix switches as well as the deflectors.

Citation Download Citation

Keiichi Nashimoto, Shigetoshi Nakamura, Hiroaki Moriyama, Masao Watanabe, Eisuke Osakabe, and Takashi Morikawa "Low-voltage drive electro-optic Pb(Zr,Ti)O₃ waveguide devices fabricated by solid-phase epitaxy", Proc. SPIE 3620, Integrated Optics Devices III, (26 March 1999); https://doi.org/10.1117/12.343724

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