激发
拓扑(电路)
齐次空间
布线(电子设计自动化)
边界(拓扑)
物理
路径(计算)
GSM演进的增强数据速率
声学
几何学
计算机科学
电信
电子工程
数学
量子力学
工程类
数学分析
电气工程
程序设计语言
作者
Long-chao Yao,Kuan-Hong Hsieh,Shih-Chia Chiu,Hong-kang Li,Shao-yong Huo,Chunming Fu
标识
DOI:10.1088/1361-648x/acc228
摘要
Abstract The control of propagation direction or path of edge states is difficult when the chirality of the excitation source and the boundary structures are determined. Here, we studied a frequency-selective routing for elastic wave based on two types of topological phononic crystals (PnCs) with different symmetries. By constructing multiple types of interfaces between different PnCs structures with distinct valley topological phases, the valley edge states of elastic wave could be realized at different frequencies in the band gap. Meanwhile, based on the simulation of topological transport, it is found that the routing path of elastic waves valley edge states highly depends on the operating frequency and the inputting port of the excitation source. By varying the excitation frequency, the transport path can be switched. The results provide a paradigm for the control of elastic wave propagation paths that could be employed for designing the frequency-dependent ultrasonic division devices.
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