Cavity optomechanics has served as a platform for studying the interaction between light and micromechanical motion via radiation pressure. Here we observe such phenomena with a graphene mechanical resonator coupled to an electromagnetic mode. We measure thermal motion and backaction cooling in a bilayer graphene resonator coupled to a microwave on-chip cavity. We detect the lowest flexural mode at 24 MHz down to 60 mK, corresponding to 50±6 mechanical quanta, which represents a phonon occupation that is nearly 3 orders of magnitude lower than that which has been recorded to date with graphene resonators.
Song, X., Oksanen, M., Li, J., Hakonen, P. J., & Sillanpää, M. A. (2014). Graphene Optomechanics Realized at Microwave Frequencies. Physical Review Letters, 113(2), 1-5. . https://doi.org/10.1103/PhysRevLett.113.027404