近日，美国印第安纳州圣母大学Singh, Ranjan团队提出了用于全空间太赫兹无线连接的片上拓扑漏波天线。相关论文于2026年1月12日发表在《自然—光子学》杂志上。
拓扑谷光子学的兴起标志着光子集成电路新时代的到来，其特点是低损耗、紧凑设计以及通过尖锐拐角时的稳定光传输。然而，大多数谷光子器件的演示仅聚焦于抑制辐射泄漏的稳健光导传输。
研究组利用漏光谷光子晶体的锥形辐射特性，展示了一种拓扑漏波天线（LWA），该天线在单一硅芯片上整合了漏波和光导拓扑边缘态。他们证明了单分支拓扑LWA在极角上实现120°大范围波束扫描，最大增益达15 dBi。此外，三分支LWA实现了覆盖整个三维立体角空间75%的波束扫描。研究组进一步展示了三个120°间隔的太赫兹无线链路的频分复用解复用功能，共同提供高增益全向全覆盖空间传输，总数据速率达72 Gbps。
此外，研究组还演示了双向双通道太赫兹无线链路，其中时间反演对称的拓扑LWA同时接收实时高清视频流并以24 Gbps的速率将片上信号传输至空间。这种片上漏光拓扑天线为下一代第六代及以后（XG）移动通信网络、成像、太赫兹Wi-Fi（TeraFi）以及太赫兹探测与测距（TeDAR）提供了多功能平台。
附：英文原文
Title: On-chip topological leaky-wave antenna for full-space terahertz wireless connectivity
Author: Wang, Wenhao, Tan, Yi Ji, Szriftgiser, Pascal, Ducournau, Guillaume, Singh, Ranjan
Issue&Volume: 2026-01-12
Abstract: The rise of topological valley photonics heralds a new era in photonic integrated circuits featuring low-loss, compact designs with robust light transport through sharp corners. However, most demonstrations of valley photonic devices only focus on the robust waveguiding of light with suppressed radiation leakage. Here we harness the conical radiation of leaky valley photonic crystals to demonstrate a topological leaky-wave antenna (LWA) that unifies leaky and guided topological edge states on a single silicon chip. We demonstrate a wide-range beam scanning of 120° in the polar angle with a maximum gain of 15dBi using a single-branch topological LWA. In addition, the 3-branch LWA enables beam scanning over 75% of the entire three-dimensional solid-angle space. We further demonstrate frequency-division demultiplexing of 3 terahertz wireless links, each radiating 120° apart to collectively deliver high-gain omnidirectional full-space coverage, achieving an aggregate data rate of 72Gbps. Furthermore, we demonstrate bidirectional dual-channel terahertz wireless links, where the time-reversal-symmetric topological LWA simultaneously receives a real-time high-definition video stream and transmits on-chip signals into free space at a data rate of 24Gbps. Our on-chip leaky topological antennas provide a versatile platform for the next generation 6G and beyond (XG) cellular networks, imaging, terahertz Wi-Fi (TeraFi), and terahertz detection and ranging (TeDAR).
DOI: 10.1038/s41566-025-01825-8
Source: https://www.nature.com/articles/s41566-025-01825-8