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<p>In this study, we simulate all-optical logic gates (AO-LGs) utilizing D-shaped silicon-on-silica waveguides at a wavelength of 1.55&#xa0;μm. The simulations are conducted using the Lumerical finite-difference time-domain (FDTD) software, which enables accurate modeling of light propagation and interaction within the waveguides. By adjusting the phase of the input signals, we control the interference patterns and, consequently, the logic operations. The performance of the AO-LGs is assessed based on the contrast ratio, a suitable metric for distinguishing between high and low logic levels. The data unequivocally demonstrates that our proposed waveguide excels in executing AO-LGs, achieving a data rate of 120 Gb/s, and showcasing significantly enhanced performance compared to existing designs. Our findings validate the use of D-shaped silicon-on-silica waveguides for efficient AO-LGs, with notable implications for developing high-speed, low-power optical computing and communication systems. These results contribute to advancing integrated photonic circuits and underscore the potential of silicon photonics in all-optical signal processing.</p>

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High-performance all-optical logic gates with D-shaped silicon-on-silica waveguides

  • 期刊论文

  • 发表日期：

    2025年9月10日

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  • Amer Kotb,
  • Kyriakos E. Zoiros,
  • Wei Chen

摘要

In this study, we simulate all-optical logic gates (AO-LGs) utilizing D-shaped silicon-on-silica waveguides at a wavelength of 1.55 μm. The simulations are conducted using the Lumerical finite-difference time-domain (FDTD) software, which enables accurate modeling of light propagation and interaction within the waveguides. By adjusting the phase of the input signals, we control the interference patterns and, consequently, the logic operations. The performance of the AO-LGs is assessed based on the contrast ratio, a suitable metric for distinguishing between high and low logic levels. The data unequivocally demonstrates that our proposed waveguide excels in executing AO-LGs, achieving a data rate of 120 Gb/s, and showcasing significantly enhanced performance compared to existing designs. Our findings validate the use of D-shaped silicon-on-silica waveguides for efficient AO-LGs, with notable implications for developing high-speed, low-power optical computing and communication systems. These results contribute to advancing integrated photonic circuits and underscore the potential of silicon photonics in all-optical signal processing.