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<p>The deployment of high-speed computations in the digital world has the advantage of using optical logic gates individually. By employing the theory of a metal–insulator-metal (MIM) waveguide-based power combiner with a footprint of 20&#xa0;µm × 20&#xa0;µm, an innovative method of building an optical half-subtractor is designed. The linear interference theory explains the operation of this device. The insertion loss and extinction ratio are observed as 1.13&#xa0;dB and 2.78&#xa0;dB, respectively. To analyze the layout, the finite-difference time-domain (FDTD) method is implemented. Electric field strengths at a specified wavelength of 1550&#xa0;nm and a refractive index of 1.65 were calculated throughout the simulation for a range of possible combinations of half-subtractor. The simplified structure can be used to create any sophisticated logic circuit for future performance improvements.</p>

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Design and modeling of half-subtractor using plasmonic waveguides for high-computational applications

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Sandip Swarnakar,
  • Chagalamarri Guru Preethi,
  • Boggarapu Geetha Nandini,
  • Nallabolu Lakshmi Keerthana,
  • Kallamadi Suchitra,
  • Arjuna Muduli,
  • Alluru Sreevani,
  • Santosh Kumar

摘要

The deployment of high-speed computations in the digital world has the advantage of using optical logic gates individually. By employing the theory of a metal–insulator-metal (MIM) waveguide-based power combiner with a footprint of 20 µm × 20 µm, an innovative method of building an optical half-subtractor is designed. The linear interference theory explains the operation of this device. The insertion loss and extinction ratio are observed as 1.13 dB and 2.78 dB, respectively. To analyze the layout, the finite-difference time-domain (FDTD) method is implemented. Electric field strengths at a specified wavelength of 1550 nm and a refractive index of 1.65 were calculated throughout the simulation for a range of possible combinations of half-subtractor. The simplified structure can be used to create any sophisticated logic circuit for future performance improvements.