  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.
