Broadband terahertz holography using isotropic VO2 metasurfaces

Jiayu Zhao; Runxuan Zhang; Sicheng Cao; Mingwei Zhuang; Zhengyong Song

doi:10.1038/s41598-024-85028-1

Broadband terahertz holography using isotropic VO₂ metasurfaces

Sci Rep. 2025 Jan 3;15(1):702. doi: 10.1038/s41598-024-85028-1.

Authors

Jiayu Zhao¹, Runxuan Zhang¹, Sicheng Cao¹, Mingwei Zhuang², Zhengyong Song³

Affiliations

¹ School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005, China.
² School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005, China. mw.zhuang@xmu.edu.cn.
³ School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005, China. zhysong@xmu.edu.cn.

Abstract

Vanadium dioxide (VO₂) exhibits exceptional phase transition characteristics that enable dynamic manipulation of electromagnetic wave. In this study, a novel design of bilayer isotropic metasurface is introduced. It leverages insulating-to-metallic phase transition of VO₂ to enable broadband holography for terahertz wave. For the metallic VO₂, the upper VO₂ antennas reflect incident terahertz wave and generate hologram. For the insulating VO₂, incident wave is reflected by the lower gold antennas and the same hologram is generated with frequency doubling. Working frequencies of the designed holograms are 1.2 THz for metallic VO₂ and 1.9 THz for insulating VO₂. Due to the broadband performance under each state, the proposed metasurface can achieve holography within 1.0-2.1 THz. It is noteworthy that the generated holograms under two states of VO₂ remain entirely independent, and another metasurface that achieves frequency-multiplexed holograms is presented. Our design may have possible applications in holographic display and information encryption.

Keywords: Hologram; Metasurface; Terahertz; VO2.

Abstract

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