Electromagnetically Coupled Resonant Face-to-Face Double-Layer Metamaterial for Highly Sensitive THz Impedance Spectroscopy.

ABSTRACT: A new electromagnetic coupling mechanism is introduced between two passive terahertz (THz) electric-LC resonator metasurfaces, aimed at maximising THz metamaterial impedance spectroscopy sensitivity, translated into resonance spectral red-shift (ΔF). When two resonant metasurfaces are brought into a face-to-face proximity and exposed to THz radiation, a resonant optical cavity is generated, and an electromagnetic coupling of THz radiation occurs from both metasurfaces. This coupling triggers the enhancement of plasmonic interaction between the incident THz radiation and the metasurfaces. It is found out that an optimal distance between the metasurfaces is a critical parameter for achieving an enhanced coupling of the electrical fields. Once optimally coupled, the double-layer metamaterial

SUBMITTER: Sengupta R 

PROVIDER: S-EPMC12520489 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature