Dynamic dual-mode terahertz device with nonvolatile switching for integrated on-chip and free-space applications.

ABSTRACT: Terahertz communication systems demand versatile devices capable of simultaneously controlling propagating waves and surface plasmon polaritons (SPPs) in far-field (FF) and near-field (NF) channels, yet existing solutions are constrained by volatile operation, single-function limitations, and the inability to integrate NF and FF functionalities. Here, we present a nonvolatile reconfigurable terahertz metasurface platform leveraging the phase-change material Ge₂Sb₂Te₅(GST) to achieve on-demand dual-channel modulation-a first in the terahertz regime. By exploiting the stark conductivity contrast of GST between amorphous and crystalline states, our design enables energy-efficient switching between NF-SPP manipulation and FF-wavefront engineering without requir

SUBMITTER: Dong Y 

PROVIDER: S-EPMC12417551 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature