245 MHz graphene-aluminum nitride nano plate resonator

This paper reports on the first demonstration of a high frequency (245 MHz) Graphene-Aluminum Nitride (G-AlN) nano plate resonator (NPR). For the first time, a two-dimensional (2D) electrically conductive graphene layer was integrated on top of an ultra-thin (500 nm) AlN nano plate and excited into a high frequency contour-extensional mode of vibration by piezoelectric transduction. Despite the reduced mass (~43%) and volume (~16%) and the increased sound velocity, hence resonant frequency (~23%), of the G-AlN NPR, unchanged device figure of merit (k_t²·Q≈18) compared to the conventional AlN NPR was recorded, which demonstrates the great potential of the proposed technology for the implementation of a new class of ultra-sensitive and low noise G-AlN resonant sensors.