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<p>All-optical devices play a crucial role in optical communication networks, optical signal processing, and photonic integrated devices. The proposal of all-optical half-subtractor is realized without any nonlinear material and semiconductor optical amplifiers using photonic crystal waveguides. The structure is a simple geometrical in its dimensions with a clear operating principle. The proposed structure is small in size of 7.8&#xa0;μm × 5.4&#xa0;μm and it requires less input power to operate. The proposed device is having good properties such as small in size, requires low input power, has less insertion losses as <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:0.41\:\text{d}\text{B}\)</EquationSource> </InlineEquation>, and provides a contrast ratio of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:38.51\:\text{d}\text{B}.\)</EquationSource> </InlineEquation> The design achieves good response time of <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:0.16\:ps\)</EquationSource> </InlineEquation>, and high bit rate <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:6.25\:Tbps\)</EquationSource> </InlineEquation> under wavelength of 1.55&#xa0;μm. Hence the structure is potentially applicable for photonic integrated and optical computing devices.</p>

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All-optical T-shaped half-subtractor for optical computing applications

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Dalai Gowri Sankar Rao,
  • Mallikarjuna Lingam Kollipara,
  • Hanumaji Kantari,
  • Sandip Swarnakar

摘要

All-optical devices play a crucial role in optical communication networks, optical signal processing, and photonic integrated devices. The proposal of all-optical half-subtractor is realized without any nonlinear material and semiconductor optical amplifiers using photonic crystal waveguides. The structure is a simple geometrical in its dimensions with a clear operating principle. The proposed structure is small in size of 7.8 μm × 5.4 μm and it requires less input power to operate. The proposed device is having good properties such as small in size, requires low input power, has less insertion losses as \(\:0.41\:\text{d}\text{B}\) , and provides a contrast ratio of \(\:38.51\:\text{d}\text{B}.\) The design achieves good response time of \(\:0.16\:ps\) , and high bit rate \(\:6.25\:Tbps\) under wavelength of 1.55 μm. Hence the structure is potentially applicable for photonic integrated and optical computing devices.