用于色散定制与波动点动力学的非局域声子晶体
Non-Local Phononic Crystals for Dispersion Customization and Undulation-point Dynamics
AI总结:
本文提出在一维弹簧-质量链中利用非局域相互作用逆向设计声子色散,可解析实现任意单带与双带色散曲线,并据此设计含普通及高阶临界点的声子晶体,研究其波包动力学。
摘要:
色散关系支配着波动行为,对其进行定制是波动操控领域的一项重大挑战。我们展示了一维弹簧-质量链上利用非局域相互作用实现声子色散的逆向设计。对于单带和双带情形,我们均能以解析精度实现任意有效的色散曲线。我们进一步运用该方法设计了具有多个普通(旋子/极大子)及高阶(波动)临界点的声子晶体,并研究了它们的波包动力学。
英文摘要:
Dispersion relations govern wave behaviors, and tailoring them is a grand challenge in wave manipulation. We demonstrate inverse design of phononic dispersion using non-local interactions on one-dimensional spring-mass chains. For both single-band and double-band cases, we can achieve any valid dispersion curves with analytical precision. We further employ our method to design phononic crystals with multiple ordinary (roton/maxon) and higher-order (undulation) critical points and investigate their wave packet dynamics.
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