人工局域表面等离激元是一种基于表面等离激元超材料的电磁谐振模式，在微波、毫米波和太赫兹频段可实现深亚波长场束缚、高品质因子、高介电灵敏度等优异传感特性，并且与平面印刷电路工艺兼容，易于和信号检测电路、无线通信电路集成，因此在小型化便携式的物联传感领域展现出广阔的应用前景。本文重点介绍人工局域表面等离激元传感的新原理、相关技术及典型应用。在传感新原理方面，讨论了新型人工局域表面等离激元的谐振结构、电磁模式、以及涡旋波传感原理；在传感指标提升技术方面，探讨了模式间耦合和有源放大两种传感增强方法；在应用探索方面，回顾了人工局域表面等离激元在溶液浓度传感、细胞传感和力学量传感等方向的代表性工作，介绍了小型化人工局域表面等离激元传感系统的最新进展。最后，对人工局域表面等离激元传感的发展趋势进行了讨论和展望。

Simultaneous wireless information and power transfer (SWIPT) architecture is commonly applied in wireless sensors or Internet of Things (IoT) devices, providing both wireless power sources and communication channels. However, the traditional SWIPT transmitter usually suffers from cross-talk distortion caused by the high peak-to-average power ratio of the input signal and the reduction of power amplifier efficiency. This paper proposes a SWIPT transmitting architecture based on an asynchronous space-time-coding digital metasurface (ASTCM). High-efficiency simultaneous transfer of information and power is achieved via energy distribution and information processing of the wireless monophonic signal reflected from the metasurface. We demonstrate the feasibility of the proposed method through theoretical derivations and experimental verification, which is therefore believed to have great potential in wireless communications and the IoT devices.

信息超表面由于其强大的处理空间电磁波的能力，成为国内外物理和信息领域的研究热点之一。文中主要介绍信息超表面在无线通信领域的一系列研究进展。信息超表面能实时操控电磁波及直接处理数字编码信息，并进一步对信息进行感知、理解，甚至记忆、学习和认知，这使其在无线通信领域展现出巨大潜能。文中首先介绍信息超表面在承担无线中继职能时所涉及的信道建模研究进展、以及其对信道的改善作用；其次介绍信息超表面在新体制发射机中的应用，通过对入射到信息超表面上的载波进行幅度或相位调制，实现了多种简化的发射机架构。此外，文中还介绍了利用信息超表面近场、远场以及散射场等信息，实现了多种新型无线通信系统。最后，文章对基于信息超表面的无线通信进行了总结和展望。

在过去的十年里，材料的拓扑相变以及它们的奇异物理现象在固态电子学领域掀起了研究热潮。近些年来，人们开始在其他系统中重现和模拟电子体系中的各种拓扑现象，包括冷原子气体、离子阱、光子学、声子学、机械波和电路体系。在这些体系平台中，由电感电容所组成的拓扑电路因具有高度灵活的设计自由度、高性价比、易加工和易集成的独特优势而备受关注。除此之外，在拓扑电路中可以方便地设计具有任意长程耦合、非线性、非互易、增益等效应的拓扑模型，从而实现很多在电子体系和光学体系中难以实现的非线性、非阿贝尔和非厄米的拓扑相变材料。本文作为拓扑电路领域的第一篇综述，系统性地回顾了过去六年拓扑电路领域的主要进展，重点关注其理论建模、电路设计与实验测量，并对拓扑电路与电子和光学体系中的拓扑绝缘体着重进行讨论和区别。本综述涵盖了多种不同类型的拓扑电路，包括含有非平庸边界态、高阶拓扑角模式以及外尔粒子的厄米拓扑电路，拥有拓扑节线和节点态的高维拓扑电路，具有趋肤效应和由增益/衰减导致的非厄米拓扑电路，自感应拓扑边界态的非线性拓扑电路，以及具有非阿贝尔规范场效应的拓扑电路。

1016001Wireless Power Transfer (WPT) and energy harvesting technologies are expected to provide revolutionary technological changes in important fields such as 5G communications and the Internet of Things. The short-range coupling WPT has gradually been commercialized, but there are still many technical bottlenecks in the practical process of microwave power transmission that can realize long-distance applications, such as the contradiction between the limited aperture of transceiver antennas and the WPT efficiency. The developments of electromagnetic metamaterials and metasurfaces have brought new breakthroughs for solving the above-mentioned problems. In this paper, we will focus on the combination of the two important technologies, and systematically review the applications of metamaterials in microwave wireless power transfer and wireless energy harvesting. The results show that the near-field focusing metasurface can significantly improve the transfer efficiency. We will also introduce the research progress of optically transparent metasurfaces and reconfigurable metasurfaces for improving WPT performance and practicability. Based on the periodically close arrangements of subwavelength metamaterial units, a wireless energy harvester with wide-angle incidence and polarization-insensitive characteristics is designed, which can replace conventional receiving antennas with higher harvesting efficiency. Furthermore, coplanar integration with the rectifying diodes makes a new concept of the rectifying metasurface, which can simplify the overall structure, reduce the size, and improve the efficiency. Finally, we will discuss the future progress of WPT, and point out the vital role that programmable and intelligent metamaterial technologies will play very important roles in future simultaneous wireless information and power transfer systems.