论文标题
非局部平面光学元件
Nonlocal Flat Optics
论文作者
论文摘要
在电磁学和光子学中，“非局部性”是指空间某个点的材料或系统的响应/输出的现象取决于空间扩展区域的输入场。尽管非本地效应和相关的波形/动量依赖性经常被忽视或被视为在跨境的背景下，但非局部平坦光学的新兴领域旨在利用强大的有效非局部性来富集和增强其响应。在这篇评论中，我们总结了该领域的最新进展，重点介绍其基本原理和各种应用，从光学计算到空间压缩。本地和非局部平面光学器件的融合可能会为使用超薄平台在真实和动量空间中控制光线开放激动人心的机会。
In electromagnetics and photonics, "nonlocality" refers to the phenomenon by which the response/output of a material or system at a certain point in space depends on the input field across an extended region of space. While nonlocal effects and the associated wavevector/momentum-dependence have often been neglected or seen as a nuisance in the context of metasurfaces, the emerging field of nonlocal flat optics seeks to exploit strong effective nonlocality to enrich and enhance their response. In this Review, we summarize the latest advances in this field, focusing on its fundamental principles and various applications, from optical computing to space compression. The convergence of local and nonlocal flat optics may open exciting opportunities in the quest to control light, in real and momentum space, using ultra-thin platforms.
