Coherent Phononics of van der Waals Layers on Nanogratings.

Autor:	Yan W; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Akimov AV; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Barra-Burillo M; CIC nanoGUNE BRTA, Tolosa Hiribidea, 76, 20018 Donostia-San Sebastián, Basque Country, Spain., Bayer M; Experimentelle Physik 2, Technische Universität Dortmund, Otto-Hahn-Strasse 4a, 44227 Dortmund, Germany., Bradford J; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Gusev VE; Laboratoire d'Acoustique de l'Uiversité du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, 72085 Le Mans, France., Hueso LE; CIC nanoGUNE BRTA, Tolosa Hiribidea, 76, 20018 Donostia-San Sebastián, Basque Country, Spain.; IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Basque Country Spain., Kent A; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Kukhtaruk S; Department of Theoretical Physics, V.E. Lashkaryov Institute of Semiconductor Physics, Pr. Nauky 41, 03028 Kyiv, Ukraine., Nadzeyka A; Raith GmbH, Konrad-Adenauer-Allee 8, 44263 Dortmund, Germany., Patanè A; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Rushforth AW; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Scherbakov AV; Experimentelle Physik 2, Technische Universität Dortmund, Otto-Hahn-Strasse 4a, 44227 Dortmund, Germany., Yaremkevich DD; Experimentelle Physik 2, Technische Universität Dortmund, Otto-Hahn-Strasse 4a, 44227 Dortmund, Germany., Linnik TL; Department of Theoretical Physics, V.E. Lashkaryov Institute of Semiconductor Physics, Pr. Nauky 41, 03028 Kyiv, Ukraine.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2022 Aug 24; Vol. 22 (16), pp. 6509-6515. Date of Electronic Publication: 2022 Aug 12.
DOI:	10.1021/acs.nanolett.2c01542
Abstrakt:	Strain engineering can be used to control the physical properties of two-dimensional van der Waals (2D-vdW) crystals. Coherent phonons, which carry dynamical strain, could push strain engineering to control classical and quantum phenomena in the unexplored picosecond temporal and nanometer spatial regimes. This intriguing approach requires the use of coherent GHz and sub-THz 2D phonons. Here, we report on nanostructures that combine nanometer thick vdW layers and nanogratings. Using an ultrafast pump-probe technique, we generate and detect in-plane coherent phonons with frequency up to 40 GHz and hybrid flexural phonons with frequency up to 10 GHz. The latter arises from the periodic modulation of the elastic coupling of the vdW layer at the grooves and ridges of the nanograting. This creates a new type of a tailorable 2D periodic phononic nanoobject, a flexural phononic crystal, offering exciting prospects for the ultrafast manipulation of states in 2D materials in emerging quantum technologies.
Databáze:	MEDLINE
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