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Piezoelectric modulation of nonlinear optical response in BaTiO3 thin film

Kormondy, Kristy J., Cho, Yujin, Posadas, Agham B., Zheng, Lu, Lai, Keji, Wang, Qingxiao, Kim, Moon J., He, Qian ORCID:, Borisevich, Albina Y., Downer, Michael C. and Demkov, Alexander A. 2018. Piezoelectric modulation of nonlinear optical response in BaTiO3 thin film. Applied Physics Letters 113 (13) , 132902. 10.1063/1.5045460

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We study the nonlinear optical response in a strained thin film ferroelectric oxide BaTiO3 using piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 (001) as a variable strain substrate and La-doped SrTiO3 as a conductive buffer layer. The rotation-anisotropic second harmonic intensity profile shows hysteretic modulation corresponding to the strain variation from the inverse piezoelectric response of the substrate. An enhancement of 15% is observed at 1.2 kV/cm, while a control sample shows negligible change as a function of piezovoltage. Reflection high-energy electron diffraction, x-ray photoelectron spectroscopy, and high-resolution scanning transmission electron microscopy reveal the epitaxial interface. X-ray diffraction and piezoresponse force microscopy confirm tetragonal distortion and ferroelectricity of the BaTiO3 overlayer. Our results suggest a promising route to enhance the performance of nonlinear optical oxides for the development of future nano-opto-mechanical devices.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: AIP Publishing
ISSN: 0003-6951
Date of First Compliant Deposit: 22 October 2018
Date of Acceptance: 24 August 2018
Last Modified: 04 May 2023 22:21

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