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

References in corpus (11)

• Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
• Micrometer-scale ballistic transport in encapsulated graphene at room temperature
• A tight-binding approach to uniaxial strain in graphene
• Estimation of Young's Modulus of Graphene by Raman Spectroscopy
• Raman 2D-Band Splitting in Graphene: Theory and Experiment
• Compression Behavior of Single-layer Graphene
• Breit-Wigner-Fano lineshapes in Raman spectra of graphene
• All-Optical Blister Test of Suspended Graphene Using Micro-Raman Spectroscopy
• Suspended Monolayer Graphene under True Uniaxial Deformation
• Independent dynamic acousto-mechanical and electrostatic control of individual quantum dots in a LiNbO${}_3$-GaAs hybrid
• Acoustoelectric transport at gigahertz frequencies in coated epitaxial graphene