Twist-on-Twist Moiré Elastic Metasurfaces.

Authors

Menghan Li, Kuan He, Zhiwen Ren, Li-Qun Chen, Hao-Wen Dong, Chenglin Han, Tianzhi Yang, Cheng-Wei Qiu

Published in

Physical review letters. Volume 135. Issue 12. Pages 126301. Sep 19, 2025.

Abstract

The concepts of twistronics and magic angle have been widely applied beyond electrons, powering up new advancements in optics, acoustics, and heat transport. However, achieving a unidirectional or all-direction "magic angle" remains an established yet unresolved challenge in twisted bilayer metasurfaces across various disciplines. Our work proposes and validates a "twist-on-twist" paradigm to realizing unidirectional propagation and robust magic angle at arbitrary directions of the elastic out-of-plane wave. Our elastic metasurface not only exhibits a twisted configuration between the stacked bilayer but also significantly enhances out-of-plane symmetry breaking by further twisting meta-atoms in one constituent layer. Our twist-on-twist method unleashes versatile potentials of twisted thin composite materials to control the extreme propagation of topological elastic waves and even opens up new possibilities for photonic, phononic, and thermal moiré metamaterials.

PMID:
41046425
Bibliographic data and abstract were imported from PubMed on 06 Oct 2025.

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