近日，南京大学李涛团队揭示了基于铌酸锂光子学的可寻址片上超表面网络动态全息显示。相关论文于2025年9月18日发表在《光：科学与应用》杂志上。

片上超表面已被用于将导波操纵到具有所需波前的自由空间，并弥合导模和自由空间光场之间的差距。然而，现有的导波辐射片上超表面在实际应用中通常缺乏动态可调性和高容量复用。

研究组提出了一种基于片上超表面网络的动态波导全息显示技术。基于几何相位和消噪相位的片上多路超表面网络实现2波导交叉阵列与两级铌酸锂（LN）开关相结合，构成可寻址框架。得益于片上超表面的多路复用能力和LN调制器的快速电光响应，以8个全息图像形式的导波辐射可以在高速下可调谐和可寻址。这项工作举例说明了一种可扩展的方法来动态操纵制导信号，并为全息显示、大容量光通信和集成光子信息处理铺平了道路。

附：英文原文

Title: Dynamic holographic display with addressable on-chip metasurface network based on lithium niobate photonics

Author: Ji, Jitao, Ye, Zhilin, Wang, Zhizhang, Sun, Jiacheng, Li, Xueyun, Li, Jian, Wang, Junyi, Fang, Bin, Gao, Zihan, Hu, Shanshan, Zhu, Shining, Li, Tao

Issue&Volume: 2025-09-18

Abstract: On-chip metasurfaces have been exploited to manipulate guided waves into free space with desired wavefronts and bridge the gap between guided modes and free-space optical fields. However, existing on-chip metasurfaces for guided wave radiation typically lack dynamic tunability and high-capacity multiplexing for their practical applications. Here, we present a dynamic waveguide-based holographic display enabled by on-chip metasurface network on lithium niobate on insulator platform. Based on geometric phase and detour phase, an on-chip multiplexed metasurface network implemented on a 2×2 waveguide crossing array is incorporated with a two-stage lithium niobate (LN) switch to construct an addressable framework. Benefiting from the multiplexing capability of on-chip metasurface and the fast electro-optical response of LN modulators, guided wave radiation in the form of eight holographic images is tunable and addressable at high speeds. This work exemplifies a scalable approach for dynamic manipulation of guided signals and paves the way towards holographic displays, high-capacity optical communications and integrated photonic information processing.

DOI: 10.1038/s41377-025-02014-6

Source: https://www.nature.com/articles/s41377-025-02014-6