Article Dans Une Revue Nano Letters Année : 2024

Mapping of vibrational modes revealing a strong and tunable coupling in two juxtaposed 3R-WSe2 nanodrums

Résumé

Two-dimensional (2D) material resonators have emerged as promising platforms for advanced nanomechanical applications due to their exceptional mechanical properties, tunability, and non-linearities. We explore the strong mechanical mode coupling between two adjacent 3R-WSe2 nanodrums at room temperature. Combining a piezoelectric material, as noncentrosymmetric 3R-WSe2, and vibration manipulation is the building block for phononic experiments with 2D materials. By strategically placing gate grids beneath each resonator and by mapping the spatial distribution of these modes, we demonstrate the ability to transit between localized modes in individual membranes to delocalized, strongly coupled modes that span the entire suspended region. The coherent coupling is strongly tunable with simple gate voltage and remarkable resonance splitting was achieved, corresponding to up to 5% of the vibration frequency. These results showcase the potential of 2D material resonators for efficient information exchange, paving the way for novel applications in quantum technologies and nanoscale sensing.

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hal-04797742 , version 1 (22-11-2024)

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Anis Chiout, Cléophanie Brochard-Richard, Fabrice Oehler, Abdelkarim Ouerghi, Julien Chaste. Mapping of vibrational modes revealing a strong and tunable coupling in two juxtaposed 3R-WSe2 nanodrums. Nano Letters, 2024, 24 (33), pp.10148-10154. ⟨10.1021/acs.nanolett.4c02214⟩. ⟨hal-04797742⟩
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