Self-powered modulation of elastomeric optical grating by using triboelectric nanogenerator

In this paper, tunable optical gratings (TOGs) based on dielectric elastomer actuator (DEA) are combined with triboelectric nanogenerator (TENG), where the actuated strain of DEA under the drive of TENG can regulate the grating period. Three different TOG structures have been delicately designed to cooperate with the unique output performance of TENG and the actuated strain of DEA can be utilized to either compress or expand the spacing between grating array.194