  We have fabricated and tested mechanical resonators consisting of a
single-atomic-layer of graphene deposited on suspended silicon nitride
membranes. With the addition of the graphene layer we retain the desirable
mechanical properties of silicon nitride but utilize the electrical and optical
properties of graphene to transduce resonant motion by both optical and
electrical means. By positioning the graphene-on-silicon-nitride drums in a
tunable optical cavity we observe position dependent damping and resonant
frequency control of the devices due to optical absorption by graphene.
