Ultra-wideband terahertz fingerprint enhancement sensing and inversion model supported by single-pixel reconfigurable graphene metasurface

Abstract The molecular fingerprint sensing technology based on metasurface has unique attraction in the biomedical field. However, in the terahertz (THz) band, existing metasurface designs based on multi-pixel or angle multiplexing usually require more analyte amount or possess a narrower tuning bandwidth. Here, we propose a novel single-pixel graphene metasurface. Based on the synchronous voltage tuning, this metasurface enables ultra-wideband ( $$\sim$$ ∼ 1.5 THz) fingerprint enhancement sensing of trace analytes, including chiral optical isomers, with a limit of detection (LoD) ≤ 0.64 μg/mm 2 . The enhancement of the fingerprint signal ( $$\sim$$ ∼ 17.4 dB) originates from the electromagnetically…

• NN
  National Natural Science Foundation of China

  Awards: 62335012, No. 61988102, No. 62335012, 61988102
• NK
  National Key Research and Development Program of China

  Award: 2022YFA1404004