Ultra-wideband valley transmission on elastic topological phononic crystals

Chengxin Cai; Guangchen He; Zhoufu Zheng; Yao Qin; Jianfei Yin

Results in Physics (Jul 2023)

Ultra-wideband valley transmission on elastic topological phononic crystals

Chengxin Cai,
Guangchen He,
Zhoufu Zheng,
Yao Qin,
Jianfei Yin

Affiliations

Chengxin Cai: Key Laboratory of Grain Information Processing and Control (Henan University of Technology), Ministry of Education, Zhengzhou 450001, China; Henan Key Laboratory of Grain Photoelectric Detection and Control, Henan University of Technology, Zhengzhou 450001, China; College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China; Corresponding authors.
Guangchen He: College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
Zhoufu Zheng: College of Intelligent Science, National University of Defense Technology, Changsha 410000, China
Yao Qin: Key Laboratory of Grain Information Processing and Control (Henan University of Technology), Ministry of Education, Zhengzhou 450001, China; Henan Key Laboratory of Grain Photoelectric Detection and Control, Henan University of Technology, Zhengzhou 450001, China; College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
Jianfei Yin: College of Intelligent Science, National University of Defense Technology, Changsha 410000, China; Corresponding authors.

Journal volume & issue: Vol. 50
p. 106570

Abstract

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The Valley Hall effect and topological chiral boundary states play a crucial role in investigating elastic wave transmission properties. In this study, to construct the phononic crystal plate structure, periodic scatterer structures are arranged on the bottom plate at a certain thickness. Simulation analysis reveal that modulating the edge states of the designed elastic phononic crystal plate achieves greater degrees of freedom and enhanced backscattering suppression capabilities. Straight boundary, right-angle turning boundary, and valley topological transport with defect and disordered boundary are achieved by utilizing edge states. Experimental validation confirm the robustness against immunodeficiency and holes. The relative width of the topological band gap in the elastic wave system examined in this study exceeds 60%, offering significant advantages and potential for practical applications. This research contributes new insights for engineering applications of ultra-wideband acoustic antennas, acoustic logic control, and other devices.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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