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  Nonlocal nonlinear phononics

Henstridge, M., Först, M., Rowe, E., Fechner, M., & Cavalleri, A. (2022). Nonlocal nonlinear phononics. Nature Physics, 18(4), 457-461. doi:10.1038/s41567-022-01512-3.

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41567_2022_1512_MOESM1_ESM.pdf (Supplementary material), 2MB
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Supplementary information: Supplementary Sections 1–9. Figs. 1–7 and Table 1.
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Source data: Matrices for 2D plots + x values and time values.; Comma-delimited data for spectrum used for Fig. 2.; Comma-delimited data for spectra shown in Fig. 3.; Comma-delimited data for calculations in Fig. 4.; Comma-delimited data for spectra, calculations and data points shown in Fig. 5.
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Open access funding provided by Max Planck Society.
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https://arxiv.org/abs/2105.08613 (Preprint)
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https://doi.org/10.1038/s41567-022-01512-3 (Publisher version)
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https://doi.org/10.1038/s41567-022-01551-w (Supplementary material)
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News & Views article "Controlling ferroelectricity below the surface" by Elsa Abreu

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 Creators:
Henstridge, M.1, Author              
Först, M.1, Author              
Rowe, E.1, Author              
Fechner, M.1, Author              
Cavalleri, A.1, 2, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Nonlinear phononics relies on the resonant optical excitation of infrared-active lattice vibrations to induce targeted structural deformations in solids. This form of dynamical crystal structure design has been applied to control the functional properties of many complex solids, including magnetic materials, superconductors and ferroelectrics. However, phononics has so far been restricted to protocols in which structural deformations occur within the optically excited volume, sometimes resulting in unwanted heating. Here, we extend nonlinear phononics to propagating polaritons, spatially separating the functional response from the optical drive. We use mid-infrared optical pulses to resonantly drive a phonon at the surface of ferroelectric LiNbO3. Time-resolved stimulated Raman scattering reveals that the ferroelectric polarization is reduced over the entire 50 µm depth of the sample, far beyond the micrometre depth of the evanescent phonon field. We attribute this effect to the anharmonic coupling between the driven mode and a polariton that propagates into the material. For high excitation amplitudes, we reach a regime in which the ferroelectric polarization is reversed, as revealed by a sign change in the Raman tensor coefficients of all the polar modes.

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Language(s): eng - English
 Dates: 2021-05-052022-01-142022-03-072022-04
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2105.08613
DOI: 10.1038/s41567-022-01512-3
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Project name : We acknowledge support from the Deutsche Forschungsgemeinschaft via the Cluster of Excellence ‘The Hamburg Centre for Ultrafast Imaging’.
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Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
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Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: 18 (4) Sequence Number: - Start / End Page: 457 - 461 Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850