Abstract
The results of an experimental and theoretical study of the effect of an intense, single-period terahertz pulse on the ferroelectric polarization in a barium–strontium titanate film are presented. Modulation of the ferroelectric polarization in the field of a terahertz pulse with a strength of up to 23.2 MV/cm is demonstrated via generation of the second optical harmonic. The presence of a nonlinear dependence of the intensity of the second optical harmonic on the electric field strength of the THz pulse is shown.
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Funding
The study was carried out with the financial support of the Russian Foundation for Basic Research, project no. 18-02-40027 and the Rosatom State Atomic Energy Corporation within the framework of scientific project no. 20-21-00043.
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Bilyk, V.R., Mishina, E.D., Ovchinnikov, A.V. et al. Ultrafast Modulation of Ferroelectric Polarization in a Ba0.8Sr0.2TiO3 Film with an Intensive Subperiodic Terahertz Pulse. High Temp 58, 942–944 (2020). https://doi.org/10.1134/S0018151X2006005X
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DOI: https://doi.org/10.1134/S0018151X2006005X