Nanoscale oscillation verification based on a field electron emitting quantum-dot array

Scientific and technological progress of the last decade has proven that quantum-dot arrays have received tremendous attention for the next generation of nano- and optoelectronic devices. An electronic displacement device by positioning a vibrating anode toward a special field electron emitter is presented. Cold field electron emission from an array of quantum dots grown on silicon carbide is applied, where the distance between the tip of emitting cones and the counter-electrode (anode) is controlled by the vibrating object under study. Concluding from Fowler-Nordheim equations, sensitivity down to a few nanometers of the vibration amplitude is possible.