Active metasurfaces have recently attracted more attention since they can make the light manipulation be versatile and real-time. Metasurfaces-based holography possesses the advantages of high spatial resolution and enormous information capacity for applications in optical displays and encryption. In this work, a tunable polarization multiplexing holographic metasurface controlled by an external magnetic field is proposed. The elaborately designed nanoantennas are arranged on the magneto-optical intermediate layer, which is placed on the metallic reflecting layer. Since the non-diagonal elements of the dielectric tensor of the magneto-optical material become non-zero values once the external magnetic field is applied, the differential absorption for the left and right circularly polarized light can be generated. Meanwhile, the amplitude and phase can be flexibly modulated by changing the sizes of the nanoantennas. Based on this, the dynamic multichannel holographic display of metasurface in the linear and circular polarization channels is realized via magnetic control, and it can provide enhanced security for optical information storage. This work paves the way for the realization of magnetically controllable phase modulation, which is promising in dynamic wavefront control and optical information encryption.

多功能高集成化全光纤器件促进了纤上实验室技术（Lab on fiber）的发展。制造阶段的快速进步为多功能即插即用光纤平台开辟了新的途径，研究人员致力于探索和优化纤上实验室器件制备技术以展示纤上实验室元件在许多应用场景中的潜力。回顾了纤上实验室传感技术的分类并对纤端微纳结构的制备工艺进行了总结，包括物理和化学加工方法，随后讨论了基于纤端超表面的纤上实验室器件制备技术的研究进展以及技术发展过程中存在的难点和要点，阐明了构建多功能高集成度多应用场景的纤上实验室传感器件的策略。纤上实验室技术已经取得了显著的成果，这表明多功能高集成化全光纤器件未来能够在物理和生化参数监测、微粒捕获及光场调控等众多场景中发挥核心作用。