Studies on structural and electro-optic properties of ferroelectric bismuth titanate thin films

W. Jo Department of Physics, Seoul National University, Seoul, 151–742, Korea

H.-J. Cho Department of Physics, Seoul National University, Seoul, 151–742, Korea

T. W. Noh Department of Physics, Seoul National University, Seoul, 151–742, Korea

Y. S. Cho Department of Physics, Seoul National University, Seoul, 151–742, Korea

S.-I. Kwun Department of Physics, Seoul National University, Seoul, 151–742, Korea

Y. T. Byun Applied Physics Lab., KIST, Seoul, 130–650, Korea.

S. H. Kim Applied Physics Lab., KIST, Seoul, 130–650, Korea.

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Abstract

Ferroelectric bismuth titanate thin films have been deposited on LaAlO₃, SrTiO₃, MgO, A1₂O₃, and ZrO₂/SiO₂/Si substrates using a Q-switched Nd:YAG laser. X-ray diffraction studies show that most films on single crystal substrates have preferential crystallographic orientation. The film on MgO(110) shows large electro-optic characteristics with an effective electro-optic coefficient of about 3.8×10⁻-¹⁵ m²/V². Using a lens coupling method, it is demonstrated that light can propagate along the Bi₄Ti₃O₁₂ layer in a Bi₄Ti₃O₁₂/ZrO₂/SiO₂/Si(100) heterostructure.

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Studies on structural and electro-optic properties of ferroelectric bismuth titanate thin films

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Studies on structural and electro-optic properties of ferroelectric bismuth titanate thin films

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