The proposed research reports the simulation of a photonic crystal (PhC) ring-resonator-based full-optical NAND and NOR gate design. The designed structure comprises a 18 × 30 square lattice dielectric silicon rod-type PhC with a refractive index of n = 3.46. An interatomic distance ‘a’ of 560 nm, radius ‘r’ of 0.21a (0.133 μm) and input wavelength λ = 1550 nm with an input signal amplitude of 1 volt are used in this design. The proposed structure provides two large band gaps in Transverse Electric polarized mode in the ranges of 1342–1980 nm and 758–779 nm. Similar parameters are used for both NAND and NOR logic gate designs. The functionality of the proposed full-optical gates depends on the ring resonator principle and the intensity of the incident light. Numerical analysis of the simulation is based on the finite difference time domain method, whereas band gap analysis is performed using the plane wave expansion method.

As a result of the development of advanced semiconductor-based optical switching devices and their commercialization, concepts and technologies in all-optical signal processing have evolved significantly in the past few years. In order to realize logical operations in photonic computing, universal gates are needed. In this research, the simple and compact all-optical NAND gate was designed using SOA and simulated at a high data rate of 10Gbps to 40 Gbps. The performance of the proposed NAND gate is shown by the numerical analysis for various input combinations and SOA. By changing wavelengths, injection currents, confinement factors, as well as optical components such as sources, amplifiers, and filters, a numerical analysis is performed. Unique results were obtained at a 10 Gbps data rate for NRZ-L user-defined bit sequences. This kind of all-optical NAND gate will be the perfect alternative in the field of optical computing to realize a high-speed optical communication network. An extinction ratio of 11.48 dB is achieved at a high-speed data rate of 10 Gbps to 40Gbps. The output spectrum of the designed NAND logic is also received for a wide input spectrum and the system responds selectively for the input wavelength at 1548.3 nm which is the probe signal wavelength.

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