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All-optical half-adder using Terahertz optical asymmetric demultiplexer (TOAD) switch is proposed and described in this manuscript. Here incoming and control signals are of same wavelength and their state of polarization is orthogonal to each other. Numerical simulation is also presented, which verifies the theoretical results. Also all-optical flip-flops (clocked S–R and J–K) with this help of half-adder...
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