中国科学院物理化学技术研究所吴雨辰课题组取得一项新突破。他们开发出用于空间目标定位和跟踪的自组装亚波长纳米光子结构。相关论文于2025年2月17日发表于国际顶尖学术期刊《美国化学会杂志》上。

研究人员首次实现了金属卤化物钙钛矿亚波长共振纳米结构的自组装，用于空间目标定位和跟踪。通过在边缘的毛细管角桥上引导结晶，课题组实现了钙钛矿纳米线之间的单晶度、亚波长尺寸和共振耦合，从而实现了角分辨率为0.523°的角分辨光电探测器。

此外，该研究团队沿着两个正交方向集成多对耦合谐振纳米线，形成角度分辨光电探测器阵列，用于静态和运动物体的空间光定位，误差小于0.6cm。这些发现为自组装共振纳米结构创造了一个平台，为多功能纳米光子和光电子器件铺平了道路。

据悉，亚波长共振纳米结构促进了强光-物质相互作用和光的可调自由度，如光谱，偏振和方向，它们促进了光子在光发射，操纵和检测方面的应用。在光探测方面，共振纳米结构使光探测和测距、光谱仪和偏振光计等新兴技术得以在超紧凑的足迹内实现。然而，共振纳米光子学在本质上依赖于纳米制造技术，这种技术在精度和可扩展性之间存在权衡。

附：英文原文

Title: Self-Assembled Subwavelength Nanophotonic Structures for Spatial Object Localization and Tracking

Author: Jianpeng Ma, Ziguang Zhao, Yingjie Zhao, Jingyuan Zhang, Jiangang Feng, Hanfei Gao, Junchuan Yang, Meng Yuan, Zhenglian Qin, Ke He, Tenglong Li, Junli Bai, Wei Li, Xiao Wei, Zihao Huang, Fengmian Li, Lei Jiang, Yuchen Wu

Issue&Volume: February 17, 2025

Abstract: Subwavelength resonant nanostructures have facilitated strong light–matter interactions and tunable degrees of freedom of light, such as spectrum, polarization, and direction, thus boosting photonic applications toward light emission, manipulation, and detection. For photodetection, resonant nanostructures have enabled emerging technologies, such as light detection and ranging, spectrometers, and polarimeters, within an ultracompact footprint. However, resonant nanophotonics usually relies on nanofabrication technology, which suffers from the trade-offs between precision and scalability. Here, we first realize the self-assembly of subwavelength resonant nanostructures of metal-halide perovskites for spatial object localization and tracking. By steering crystallization along capillary corner bridges localized at edges, we achieve single crystallinity, subwavelength size, and resonant coupling between perovskite nanowires, thus leading to an angle-resolved photodetector with an angular resolution of 0.523°. Furthermore, we integrate multiple pairs of coupled resonant nanowires along two orthogonal orientations to form angle-resolved photodetector arrays for spatial light localization of both static and moving objects with an error of less than 0.6 cm. These findings create a platform for self-assembled resonant nanostructures, thus paving the way for multifunctional nanophotonic and optoelectronic devices.

DOI: 10.1021/jacs.4c14899

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.4c14899