Exploring Plasmonic Logic Gates Based on PIT Effect

A novel multi-functional logic device based on plas-monic induced transparency (PIT) effect is proposed. It consists of a pair of parallel metal-insulator-metal (MIM) waveguides and two identical hexagonal resonators in which a rotatable ellipse is embedded respectively. In the device, four logic functions: AND, NAND, NOR and NOT can be achieved through changing the rotatation angle of the ellipses. In addition, AND, NAND, and NOR can be operated simultaneously with higher output contrast ratios. This design can not only improve the integration of the chip, but also increase the speed of the logic computing. Therefore, this work supplies a potential application value for optical logic integrated circuits.