Ultra-broadband multi-character logic gates integrated by inverse designed logic units

Meitong Dong, Huiqin Wang*, Haoji Yang, Nanrun Zhou, Cuicui Lu, Heqing Xu, Zijing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We propose a method to design multi-character logic gates, where the method of moving asymptotes (MMA) is used to design logic device unit structures, and then multi-character logic gates are constructed by integrating these basic logic units. With this approach, we successfully designed three-character AND and OR gates with dimensions of 2 μm × 3 μm, as well as four-character AND and OR gates with dimensions of 2 μm × 4 μm. The results show that the maximal contrast ratio of the three-character AND gate is 19.411 at wavelengths from 950 nm to 1600 nm, and the three-character OR gate achieves a maximal contrast ratio of 12.551 at wavelengths from 1200 nm to 1600 nm. For the four-character AND gate, the maximal contrast ratio is 9.269 at wavelengths from 950 nm to 1550 nm, while the four-character OR gate reaches a maximal contrast ratio of 17.754 at wavelengths from 1000 nm to 1600 nm. Compared to traditional binary logic gates, our multi-character logic gates achieve logical states directly without needing control ports, reducing design complexity and enhancing performance. These innovative logic gates have broad application prospects in future digital system designs.

Original languageEnglish
Article number131545
JournalOptics Communications
Volume579
DOIs
Publication statusPublished - Apr 2025

Keywords

  • All-optical logic gates
  • MMA intelligent algorithm
  • Multi-character
  • Ultra-broadband

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