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.

中文翻译：

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具有强亚周期太赫兹脉冲的 Ba0.8Sr0.2TiO3 薄膜中铁电极化的超快调制

摘要

本文介绍了强单周期太赫兹脉冲对钛酸钡-锶薄膜中铁电极化影响的实验和理论研究结果。通过产生二次光谐波，证明了在强度高达 23.2 MV/cm 的太赫兹脉冲场中对铁电极化的调制。显示了二次光谐波强度对太赫兹脉冲电场强度的非线性依赖性。