All-optical devices are proven to have broad range of applications in the areas of communication. These devices form the basic building blocks of complex integrated circuits. By integrating these devices in the elds like signal processing, chip designing and network computations, a much more e cient device can be achieved. The design of all-optical logic gates like NAND, NOR and XNOR using plasmonic based Y-shaped power combiner is implemented in this paper work. The concept of linear interference is applied in the combiner to achieve the desired logic gates. The work is simulated and analysed using Finite-Difference Time Domain (FDTD) method, which is valuated using MATLAB. The present work ts under the area of 60 µm 2 which is smaller than the existing structures. The insertion loss, transmission e ciency and extinction ratio parameters are calculated and compared to variety of other designs.

All-optical logic gates are exceptionally suited for Boolean ultrahigh-speed operation and logical computing. This study presents a plasmonic model that uses a Y-shaped metal–insulator–metal waveguide structure that realizes the ultrafast all-optical AND, XOR, and XNOR gate operation that is developed at a footprint of 6.6 µ m × 3.4 µ m with a wavelength of 1.55 µm. This construction relies on the notion of linear interference. The insertion loss and extinction ratio of the model are observed as 1.49 dB and 21.49 dB for AND, 1.03 dB and 18.97 dB for XOR, and 2.06 dB, and 10.92 dB for XNOR, respectively. The transmission efficiency, response time, and speed of the structure also are calculated and are used to improve the performance of any complex circuit in the future. The theoretical analysis of the proposed structure is carried out using the finite-difference time-domain method.

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