In this paper, an effective design of all-optical logic gates like XOR gate and AND gate is presented. The structure of these two logic gates is based on T-shape waveguide with optimized silica dielectric rod. Along with the two input ports which are essential for the required logical operation, an extra reference input port is used. These two logic gates can be used to construct for various combinational logic circuits, data bit comparison circuits, pattern matching, data encoding/decoding and different switching functions etc.
Sandip Swarnakar, Santosh Kumar, Sandeep Sharma, and Lokendra Singh, "Design of XOR/AND gate using 2D photonic crystal principle," Proc. SPIE 10130, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VI, 101300Q (Presented at SPIE OPTO: February 02, 2017; Published: 28 January 2017); https://doi.org/10.1117/12.2250276.
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