Details

Autor(en) / Beteiligte

• Wang, Ji-Qian
• Zhang, Zi-Dong
• Yu, Si-Yuan
• Ge, Hao
• Liu, Kang-Fu
• Wu, Tao
• Sun, Xiao-Chen
• Liu, Le
• Chen, Hua-Yang
• He, Cheng
• Lu, Ming-Hui
• Chen, Yan-Feng

Titel

Extended topological valley-locked surface acoustic waves

Ist Teil von

• Nature communications, 2022-03, Vol.13 (1), p.1324-1324, Article 1324

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2022

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• Stable and efficient guided waves are essential for information transmission and processing. Recently, topological valley-contrasting materials in condensed matter systems have been revealed as promising infrastructures for guiding classical waves, for they can provide broadband, non-dispersive and reflection-free electromagnetic/mechanical wave transport with a high degree of freedom. In this work, by designing and manufacturing miniaturized phononic crystals on a semi-infinite substrate, we experimentally realized a valley-locked edge transport for surface acoustic waves (SAWs). Critically, original one-dimensional edge transports could be extended to quasi-two-dimensional ones by doping SAW Dirac "semimetal" layers at the boundaries. We demonstrate that SAWs in the extended topological valley-locked edges are robust against bending and wavelength-scaled defects. Also, this mechanism is configurable and robust depending on the doping, offering various on-chip acoustic manipulation, e.g., SAW routing, focusing, splitting, and converging, all flexible and high-flow. This work may promote future hybrid phononic circuits for acoustic information processing, sensing, and manipulation.