Optical energy harvesting in vibrate maglev graphite

Abstract In this paper, we design an optical energy harvesting system composed of a magnet with a smooth surface, magnetically levitated pyrolytic graphite, and a light source. A periodic force field was constructed by modulating the light absorption of graphite at different positions through the interference of light on the smooth magnet surface and the linear variation of graphite magnetization with light absorption, thereby driving the graphite to vibrate periodically. It is confirmed in our study that this photo-magnetic effect can convert continuous light energy into vibrational kinetic energy, the driving light intensity can be reduced by 3-4 orders of magnitude and the amplitude can reach tens of microns, and the wavelength range of the driving light can cover the visible and infrared light bands, which makes it possible to develop a new type of light-driven micro-nano mechanical motor or light energy harvesting system.