Reflecting codes are frequently employed to reduce erroneous output from electromechanical/optical switches and to assist error correction in today’s communication systems such as digital terrestrial television and some cable TV systems. In this work, all optical reflective code is designed and simulated using a nonlinear optical effect inside metal-insulator-metal plasmonic waveguides based on Mach–Zehnder interferometer. Finite-difference time-domain (FDTD) method is used to analyze the performance of proposed structure and results are verified with MATLAB simulation.
Recently, optical waveguides designed by utilizing metal-insulator-metal (MIM) are widely used because of its excellent ability to limit surface plasmons to a deep sub-wavelength scale. In this paper, combined design of OR and universal NAND logic gates is proposed using the switching property of non-linear effect of plasmonic-MIM waveguide-based Mach–Zehnder interferometer. The footprint of proposed Feynman logic gate is 42μm*9μm, extinction ratio is 9.03dB for NAND gate and 11.25dB for OR gate. An insertion loss of -0.705dB for NAND gate and -0.655 dB for OR which is much better as compared to electro-optic based structures.The simulation is done using a finite-difference time-domain (FDTD) method and mathematical modeling of the device that has been verified by using MATLAB.
A microring resonator based sensor is proposed to detect different poisonous gases, such as carbon monoxide, phosphine, and nitrogen dioxide. These gases are very dangerous in environment if the leakage concentration is high. The single slot microring resonator sensor is used for detection of hazardous gases. The sensor has been analyzed through finite-difference-time-domain method by varying the radii of microring resonator from 1.4 μm to 2.2 μm and refractive index of the analytes. Transmission of microring resonator is observed and detected the different poisonous gases.
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