Programmable Coding Acoustic Topological Insulator
Programmable Coding Acoustic Topological Insulator
复制标题
可编程编码声学拓扑绝缘体
DOI：
10.1002/adma.201805002
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发表时间：
2018-10
影响因子：
29.4
通讯作者：
Liu Xiao-jun
中科院分区：
文献类型：
--
作者：
Xia Jian-ping;Jia Ding;Sun Hong-xiang;Yuan Shou-qi;Ge Yong;Si Qiao-rui;Liu Xiao-jun
拓扑声学最近彻底改变了声传播的基本概念，产生了惊人的独特的声学边缘模式免疫后向散射。尽管在这一领域取得了迅速的进展，同时实现可重构性，智能化，并自动控制声传播路径是一个巨大的挑战。通过提出基于两个数字元件“0”或“1”的可编程声学拓扑绝缘体的概念来克服这一挑战，该数字元件由不同直径的圆柱形棒制成的蜂窝晶格声波晶体组成。拓扑绝缘体中的声学传播路径可以通过编程不同的编码序列来自动控制，这是由于数字元件的两个界面上的赝自旋相关边缘模式的有效变换。更重要的是，通过实验制造了一种独特的单元，该单元具有由气缸自动操纵的“0”或“1”响应，并设计了具有可编程功能的拓扑绝缘体，以实现三种数字声学器件，例如单刀双掷开关，单刀单掷开关和可调谐逻辑门。提出的可编程拓扑绝缘体可以使未来的智能声学设备具有令人兴奋的可重新配置和可编程功能，这可能会在集成声学、声学安全和信息处理等各种应用中带来重要进展。
Topological acoustics has recently revolutionized fundamental concepts of acoustic propagation, giving rise to strikingly unique acoustic edge modes immune to backscattering. Despite the rapid progress in this field, simultaneous realization of reconfigurability, intelligentization, and automatic control over acoustic propagation paths is posing a great challenge. This challenge is overcome by proposing the concept of a programmable acoustic topological insulator based on two digital elements “0” or “1,” which consist of honeycomb‐lattice sonic crystals made of cylindrical rods with different diameters. The acoustic propagation paths in the topological insulators can be controlled automatically by programming different coding sequences, which arises from efficient transformation of pseudospin‐dependent edge modes on both interfaces of the digital elements. More importantly, a unique unit is experimentally fabricated that has either a “0” or “1” response automatically manipulated by an air cylinder, and design topological insulators with programmable functionality, to realize three digital acoustic devices, such as a single‐pole double‐throw switch, a single‐pole single‐throw switch, and a tunable logic gate. The proposed programmable topological insulators may enable future intelligent acoustic devices with exciting reconfigurable and programmable functionalities, which may lead to important advances in various applications, such as integrated acoustics, acoustic security, and information processing.
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