TY - JOUR
T1 - Ultra-broadband multi-character logic gates integrated by inverse designed logic units
AU - Dong, Meitong
AU - Wang, Huiqin
AU - Yang, Haoji
AU - Zhou, Nanrun
AU - Lu, Cuicui
AU - Xu, Heqing
AU - Zhang, Zijing
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/4
Y1 - 2025/4
N2 - 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.
AB - 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.
KW - All-optical logic gates
KW - MMA intelligent algorithm
KW - Multi-character
KW - Ultra-broadband
UR - http://www.scopus.com/inward/record.url?scp=85216488701&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2025.131545
DO - 10.1016/j.optcom.2025.131545
M3 - Article
AN - SCOPUS:85216488701
SN - 0030-4018
VL - 579
JO - Optics Communications
JF - Optics Communications
M1 - 131545
ER -