Effect of optical pump on the dielectric properties of the Barium Strontium Titanate film

Chunya LuoDepartment of Physics and Mechanical & Electrical Engineering, Institute of Information Science and Technology, Hubei University of Education, Wuhan, China;College of Electronic Information, Huanggang Normal University, Huanggang, China;Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Jie JiWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Yunkun RaoWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Gang YaoWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Dan LiDepartment of Physics and Mechanical & Electrical Engineering, Institute of Information Science and Technology, Hubei University of Education, Wuhan, China

Ying ZengWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Longsheng XiaoDepartment of Physics and Mechanical & Electrical Engineering, Institute of Information Science and Technology, Hubei University of Education, Wuhan, China

Xinxing LiuWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Jianquan YaoDepartment of Physics and Mechanical & Electrical Engineering, Institute of Information Science and Technology, Hubei University of Education, Wuhan, China;Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China

Furi LingWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaCorrespondence[email protected]

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ABSTRACT

We investigated the tunability of the dielectric characterization spectra of the Ferroelectric Barium Strontium Titanate (Ba_0.5Sr_0.5TiO₃) thin films in an external optical field through the terahertz time-domain spectroscopy. The real part of the permittivity reached up to 22% when we applied the optical field up to 600mW/cm² and the imaginary part is not really obvious. And the results are attributed to the soft mode harden caused by the excited optical field.

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Funding

This work was supported by the project of Hubei Ministry of Education (No. Q20152904).

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Effect of optical pump on the dielectric properties of the Barium Strontium Titanate film

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Effect of optical pump on the dielectric properties of the Barium Strontium Titanate film

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