Dynamic local strain in graphene generated by surface acoustic waves

Abstract

We experimentally demonstrate that the Raman active optical phonon modes of single layer graphene can be modulated by the dynamic local strain created by surface acoustic waves (SAWs). In particular, the dynamic strain field of the SAW is shown to induce a Raman scattering intensity variation as large as 15% and a phonon frequency shift of up to 10 cm${}^{-1}$ for the G band, for instance, for an effective hydrostatic strain of 0.24% generated in a single layer graphene atop a LiNbO${}_3$ piezoelectric substrate with a SAW resonator operating at a frequency of $\sim$ 400 MHz. Thus, we demonstrate that SAWs are powerful tools to modulate the optical and vibrational properties of supported graphene by means of the high-frequency localized deformations tailored by the acoustic transducers, which can also be extended to other 2D systems.

10 pages, 7 figures

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Cited by in corpus (7)

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• Dynamically-enhanced strain in atomically thin resonators
• Exciton-Plasmon Coupling in 2D Semiconductors by Surface Acoustic Waves
• Group theoretical and ab-initio description of color center candidates in fluorographene
• Generation of a single-cycle surface acoustic wave pulse on LiNbO${}_3$ for application to thin film materials
• Observation of Shapiro Steps in the Charge Density Wave State Induced by Strain on a Piezoelectric Substrate
• Rectification from band gap oscillation