论文标题
滚动波动的波动旋转
Rolling Waves with Non-Paraxial Phonon Spins
论文作者
论文摘要
我们演示了整体中的一类新的弹性波：当纵向和横向成分以相同的速度传播时，与波矢量不平行的旋转的滚动波可能会出现。首先，我们给出了旋转的一般定义。然后，由于各向同性固体中不存在滚动波，因此我们得出了各向异性介质的条件，并继续设计能够托管滚动波的构造材料。从数字上讲，我们通过反射显示旋转操作。可以使用可用技术来制造这项工作中报告的结构，从而为声学，力学和语音学上的旋转技术开辟了新的可能性。
We demonstrate a new class of elastic waves in the bulk: When longitudinal and transverse components propagate at the same speed, rolling waves with a spin that is not parallel to the wave vector can emerge. First, we give a general definition of spin for traveling waves. Then, since rolling waves cannot exist in isotropic solids, we derive conditions for anisotropic media and proceed to design architected materials capable of hosting rolling waves. Numerically, we show spin manipulations by reflection. Structures reported in this work can be fabricated using available techniques, opening new possibilities for spin technologies in acoustics, mechanics and phononics.
