Nonlinear phononics in 2D SnTe: a ferroelectric material with phonon dynamical amplification of electric polarization

Abstract

Ultrafast optical control of ferroelectricity using intense terahertz fields has attracted significant interest. Here we show that the nonlinear interactions between two optical phonons in SnTe, a two-dimensional in-plane ferroelectric material, enables a dynamical amplification of the electric polarization within subpicoseconds time domain. Our first principles time dependent simulations show that the infrared-active out-of-plane phonon mode, pumped to nonlinear regimes, spontaneously generates in-plane motions, leading to rectified oscillations in the in-plane electric polarization. We suggest that this dynamical control of ferroelectric material, by nonlinear phonon excitation, can be utilized to achieve ultrafast control of the photovoltaic or other non-linear optical responses.

arXiv comment21 pages, 5 figures

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Cited by in corpus (6)

• Phonon Magnetic Moment from Electronic Topological Magnetization
• Simulating terahertz field-induced ferroelectricity in quantum paraelectric SrTiO${}_3$
• Cavity control of nonlinear phononics
• Light-Driven Transitions in Quantum Paraelectrics
• Generating coherent phonon waves in narrow-band materials: a twisted bilayer graphene phaser
• Direct observation of the electronic structure of even-layer puckered SnTe monolayer films on graphene