An All Optical NAND Gate Using Nonlinear Photonic Crystal Ring Resonators

Optical NAND gate is a universal gate which can be used for implementing different kinds of combinational circuits without using other gates. Due to significance of optical NAND gates in the optical communications, in this paper we proposed a novel structure for designing an all optical NAND gate based on photonic crystal structures. The proposed structure was designed using threshold switching mechanism which can be implemented using nonlinear ring resonators. In the proposed structure delay time is about 2.3 ps. © 2018 Walter de Gruyter GmbH, Berlin/Boston.