Abstract
Logic gates are the key components in optical communication technology for performing a wide range of operations. This study presents a design of all-optical XNOR/NAND/NOR integrated device based on the optical interference-effect. A device using Y-shaped waveguides of 2-D photonic crystal made of silicon rods with an air background is built. In this research, the XNOR, NAND, and NOR logic gates were all implemented in a single structure by making appropriate adjustments to phase of input optical signals. Using plane-wave extension (PWE) and finite-difference-time-domain (FDTD) methods, the architecture is simulated for XNOR/NAND/NOR logic gates numerically and verified their accuracy. The proposed structure for XNOR/NAND/NOR logic gates takes up a smaller area of \(9\, \upmu\mathrm{m }\times 9\, \upmu\mathrm{m}\), and it gives a contrast ratio of \(9.91\,\mathrm{dB}\), \(11.7\,\mathrm{dB}\), and \(8.75\,\mathrm{dB}\) for XNOR, NAND, and NOR logic gates respectively at a wavelength of \(1.55\, \upmu\mathrm{m}\). Additionally, NAND logic has less insertion loss of \(0.01\,\mathrm{dB}\) and transmission ratio of more than \(95 {\%}\). As a result, the suggested logic gates may have a place in optical signal processors and other photonic integrated devices.
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SS: Conceptualization; Investigation; Formal analysis, Writing—original draft, Methodology, Supervision. KBK: Investigation; Formal analysis, Writing—original draft. KCY: Prepared ghaphes, Comparision with previous work. VP: Formal analysis, Methodology. AM: Prepared figures. SK: Validation; Writing—review & editing.
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Swarnakar, S., Kumar, K.B., Yashwanth, K.C. et al. A Y-shaped photonic integrated device with XNOR/NAND/NOR for optical signal processing. Opt Quant Electron 55, 801 (2023). https://doi.org/10.1007/s11082-023-05068-1
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DOI: https://doi.org/10.1007/s11082-023-05068-1