Details

Autor(en) / Beteiligte

• Yu, Si-Yuan
• He, Cheng
• Wang, Zhen
• Liu, Fu-Kang
• Sun, Xiao-Chen
• Li, Zheng
• Lu, Hai-Zhou
• Lu, Ming-Hui
• Liu, Xiao-Ping
• Chen, Yan-Feng

Titel

Elastic pseudospin transport for integratable topological phononic circuits

Ist Teil von

• Nature communications, 2018-08, Vol.9 (1), p.3072-8, Article 3072

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Precise control of solid-state elastic waves’ mode content and coherence is of great use nowadays in reinforcing mechanical energy harvesting/storage, nondestructive material testing, wave-matter interaction, high sensitivity sensing, and information processing, etc. Its efficacy is highly dependent on having elastic transmission channels with lower loss and higher degree of freedom. Here, we demonstrate experimentally an elastic analog of the quantum spin Hall effects in a monolithically scalable configuration, which opens up a route in manipulating elastic waves represented by elastic pseudospins with spin-momentum locking. Their unique features including robustness and negligible propagation loss may enhance elastic planar-integrated circuit-level and system-level performance. Our approach promotes topological materials that can interact with solid-state phonons in both static and time-dependent regimes. It thus can be immediately applied to multifarious chip-scale topological phononic devices, such as path-arbitrary elastic wave-guiding, elastic splitters and elastic resonators with high-quality factors. Precise control of elastic waves is of great use in current technologies. Here, Yu et al. realize the analogue of quantum spin Hall effects for the elastic waves in a plain plate consisting of identical perforated holes in wavelength scales.