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Topological logic gates based on valley-locked interface states of acoustic and electromagnetic waves in two-dimensional phoxonic crystals.

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Title: Topological logic gates based on valley-locked interface states of acoustic and electromagnetic waves in two-dimensional phoxonic crystals.
Authors: Wang, Hao-Jie1 (AUTHOR), Qiao, Yi-Han1 (AUTHOR), Liu, Yi-Da2 (AUTHOR), Ma, Tian-Xue1 (AUTHOR) matx@bjtu.edu.cn, Wang, Yue-Sheng1,2 (AUTHOR)
Source: Journal of Physics D: Applied Physics. 2026, Vol. 59 Issue 20, p1-15. 15p.
Subjects: Electromagnetic waves, Boolean functions, Logic circuits, Phase modulation, Sound waves
Abstract: Topological phases of classical waves offer a robust mechanism for wave transport, yet achieving complex and robust logic operations within a unified multi-physical platform remains a significant challenge. In this work, we propose and numerically demonstrate a topological logic gate platform based on two-dimensional phoxonic crystals (PxCs) supporting valley-locked interface states for both acoustic and electromagnetic waves. Utilizing a unified architecture composed of triangular silicon scatterers, we successfully realize a complete suite of Boolean functions, including AND, OR, XOR, NOR, XNOR, and NAND. Fundamental logic operations are achieved through phase-modulated coherent interference, while complex reconfigurable functions are enabled by incorporating a tunable bias input into cascaded topological waveguides. Furthermore, the robustness of the PxC system is validated against randomized geometric disorders, including scatterer rotation, size scaling, and scatterer removal. The logic functionality is insensitive to moderate fabrication imperfections. This research demonstrates that a single, fixed geometric configuration can concurrently support robust topological transport for both acoustic and electromagnetic waves. This synergistic approach eliminates the need for redundant structural designs and cross-platform integration, providing a foundational framework for compact, multi-physical integrated wave computing and hybrid signal processing networks. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Topological phases of classical waves offer a robust mechanism for wave transport, yet achieving complex and robust logic operations within a unified multi-physical platform remains a significant challenge. In this work, we propose and numerically demonstrate a topological logic gate platform based on two-dimensional phoxonic crystals (PxCs) supporting valley-locked interface states for both acoustic and electromagnetic waves. Utilizing a unified architecture composed of triangular silicon scatterers, we successfully realize a complete suite of Boolean functions, including AND, OR, XOR, NOR, XNOR, and NAND. Fundamental logic operations are achieved through phase-modulated coherent interference, while complex reconfigurable functions are enabled by incorporating a tunable bias input into cascaded topological waveguides. Furthermore, the robustness of the PxC system is validated against randomized geometric disorders, including scatterer rotation, size scaling, and scatterer removal. The logic functionality is insensitive to moderate fabrication imperfections. This research demonstrates that a single, fixed geometric configuration can concurrently support robust topological transport for both acoustic and electromagnetic waves. This synergistic approach eliminates the need for redundant structural designs and cross-platform integration, providing a foundational framework for compact, multi-physical integrated wave computing and hybrid signal processing networks. [ABSTRACT FROM AUTHOR]
ISSN:00223727
DOI:10.1088/1361-6463/ae6925