Many remarkable properties of graphene are derived from its large energy window for Dirac-
like electronic states and have been explored for applications in electronics and photonics.
In addition, strong electron-phonon interaction in graphene has led to efficient photo-thermo
energy conversions, which has been harnessed for energy applications. By combining the
wavelength independent absorption property and the efficient photo-thermo energy
conversion, here we report a new type of applications in sound wave generation underlined …