论文标题
弹性板中钻石孔的动态盖
Dynamic cloaking of a diamond-shaped hole in elastic plate
论文作者
论文摘要
在连续波状态下，对弯曲波的隐形斗篷大部分都进行了检查，而对于短脉冲可能会恶化。在这里，我们提出了基于区域保护坐标转换的弯曲波的单向隐形斗篷的实际实现。时间分辨的实验揭示了隐形斗篷如何偏离脉冲波的初始轨迹，以及初始波前如何完美地重新组合斗篷后面，尽管出现了一个先行者，但仍留下了钻石形孔的看不见。三维全弹性模拟支持我们的实验观察结果。
Invisibility cloaks for flexural waves have been mostly examined in the continuous-wave regime, while invisibility is likely to deteriorate for short pulses. Here, we propose the practical realization of a unidirectional invisibility cloak for flexural waves based on an area-preserving coordinate transformation. Time-resolved experiments reveal how the invisibility cloak deviates a pulsed plane-wave from its initial trajectory, and how the initial wavefront perfectly recombines behind the cloak, leaving the diamond-shaped hole invisible, notwithstanding the appearance of a forerunner. Three-dimensional full-elasticity simulations support our experimental observations.
