Plasmonic devices are considered as a potential platform to realize highly integrated photonic circuits. Optical logic gates are fundamental computing and light-controlling elements in optical circuits and optical computing, and many plasmonic logic gates have been studied. However, these devices can only realize single or several specific logical operations. In this work, we propose a multiport plasmonic system to realize all-logical processing based on coding metamaterials (CMs) and inverse design. We utilize nondominated sorting genetic algorithm-II to optimize the distributions of CMs. After optimization, the simulation results exhibit that all types of logic gates (AND, OR, NOT, NAND, NOR, XOR and XNOR) can be obtained with the operating wavelength of 1.31μm and a small footprint (0.8×1.1 μm2). Moreover, the extinction ratio between logical "1" and "0" states exceeds 20 dB for OR, NOT, XNOR and XOR logic gates.
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