Deng Juan, Zhu Xinyu, Duan Jiaxi, Huang Zhendong, Wang Shengming, Wang Xingyu, Gao Fan, Tang Yijun, Xu Danyang
Department of Physics, Zhejiang University of Technology, Hangzhou 310023, People's Republic of China.
Collaborative Innovation Center for Bio-Med Physics Information Technology of ZJUT, Zhejiang University of Technology, Hangzhou 310023, People's Republic of China.
Nanotechnology. 2025 Aug 7;36(32). doi: 10.1088/1361-6528/adf560.
Driven by the need for miniaturization and integration, incorporating multiple functions into a single metasurface based on hybridized tunable materials is particularly demanding in the terahertz (THz) range. However, existing hybrid material metasurfaces either need to change their sizes or cannot fully explore their design potential, particularly failing to integrate both near-field and far-field functions into a single metasurface, which restricts the development and application of terahertz metasurface devices. In this paper, combing with graphene and vanadium dioxide (VO), a multifunctional terahertz metasurface is designed with only a single-sized nanostructure, which can achieve five-functional switchable and integration. As a proof, the simulated metasurface can similarly be as a polarization conversion device, a broadband modulation device and an absorption-device, and more importantly, it can also realize the functions of the near-field nanoprinting imaging 'A' and far-field holographic imaging 'B'. The introduction of multiple tunable materials into a single terahertz metasurface and the simultaneous integration of the near- and far-field functions provide a new design platform for tunable multifunctional devices, which can contribute to the development of miniaturization and integration of terahertz devices.
受小型化和集成需求的驱动，基于混合可调谐材料将多种功能集成到单个太赫兹超表面中在太赫兹（THz）频段极具挑战性。然而，现有的混合材料超表面要么需要改变其尺寸，要么无法充分挖掘其设计潜力，特别是无法将近场和远场功能集成到单个超表面中，这限制了太赫兹超表面器件的发展和应用。本文结合石墨烯和二氧化钒（VO），设计了一种仅具有单一尺寸纳米结构的多功能太赫兹超表面，该超表面能够实现五种功能的可切换和集成。作为验证，模拟的超表面同样可以作为偏振转换器件、宽带调制器件和吸收器件，更重要的是，它还能够实现近场纳米打印成像“A”和远场全息成像“B”的功能。将多种可调谐材料引入单个太赫兹超表面并同时集成近场和远场功能，为可调谐多功能器件提供了一个新的设计平台，这有助于太赫兹器件的小型化和集成化发展。
