A thermally reconfigurable VO₂ metasurface for independent four-channel holographic imaging in the terahertz range.

Authors

Shuai Cui, Yuxin Fan, Sheng Fu, Shengyu Qu, Yang Gao

Published in

Physical chemistry chemical physics : PCCP. Jul 09, 2026. Epub Jul 09, 2026.

Abstract

This work presents a novel four-mode spin-selective metasurface that integrates both the propagation phase and the geometric phase to achieve independent four-channel holographic imaging in the terahertz range. When the temperature exceeds 68 °C, vanadium dioxide (VO₂) transitions into its metallic state. Under incident left-handed circularly polarized (LCP) light, the metasurface reconstructs a holographic letter "I", while under right-handed circularly polarized (RCP) light, it generates a holographic letter "H". Similarly, when the temperature drops below 68 °C, VO₂ reverts to its insulating state. In this state, the metasurface produces digital holograms of "1" in the LCP channel and "2" in the RCP channel. The proposed metasurface demonstrates excellent wavefront control performance within a broad frequency range of 0.8-1.2 THz.

PMID:
42423043
Bibliographic data and abstract were imported from PubMed on 09 Jul 2026.

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