Design and modelling of all-optical NAND gate using metal–insulator–metal (MIM) waveguides-based Mach–Zehnder interferometers for high-speed information processing

All the basic logic gates play a major role in carrying out mathematical computation. The drawbacks of conventional electronics are alleviated by all-optical integrated circuits with great application high-speed computing and information processing. In this paper, plasmonic metal–insulator–metal (MIM) waveguides have an excellent property propagating surface plasmons beyond diffraction limit up to deep sub-wavelength scale. All-optical NAND gate design is optimized using MIM waveguide-based Mach–Zehnder interferometers (MZIs) footprint 36 µm × 8 that works at 1.55 operating wavelength. better performance proposed device achieved, such as extinction ratio 10.55 dB, insertion loss obtained 0.506 response time 262 ps. verified finite-difference time-domain (FDTD) technique further analysis carried computation MATLAB simulation results.