论文标题
具有任意波前的复杂介质中的相干波控制
Coherent wave control in complex media with arbitrary wavefronts
论文作者
论文摘要
波前塑形（WFS）已成为控制多种波浪现象（光，声音，微波，...）的强大工具，用于应用程序，包括成像，通信，能量传递，微观流动和散射异常的应用。尽管如此，实际上，多个输入通道的必要连贯控制仍然是一个烦人的问题。在这里，我们通过用可编程的元原子掺杂无序介质来克服这一困难，以使其适应施加的任意传入波前。除了提高对精心塑形的事件波前的需求外，我们的方法还解锁了新的机会，例如依次实现具有相同任意波前的不同功能。我们使用混乱腔中的可编程跨面对电磁波进行实验证明了我们的概念，并适用于广泛的Wigner-Smith操作员以及相干的完美吸收。我们期望我们从根本上对相干波控制的新观点，以促进复杂的WFS方案转变为各种波浪现象的实际应用。
Wavefront shaping (WFS) has emerged as powerful tool to control the propagation of diverse wave phenomena (light, sound, microwaves, ...) in disordered matter for applications including imaging, communication, energy transfer, micromanipulation, and scattering anomalies. Nonetheless, in practice the necessary coherent control of multiple input channels remains a vexing problem. Here, we overcome this difficulty by doping the disordered medium with programmable meta-atoms in order to adapt it to an imposed arbitrary incoming wavefront. Besides lifting the need for carefully shaped incident wavefronts, our approach also unlocks new opportunities such as sequentially achieving different functionalities with the same arbitrary wavefront. We demonstrate our concept experimentally for electromagnetic waves using programmable metasurfaces in a chaotic cavity, with applications to focusing with the generalized Wigner-Smith operator as well as coherent perfect absorption. We expect our fundamentally new perspective on coherent wave control to facilitate the transition of intricate WFS protocols into real applications for various wave phenomena.
