Tunable VO₂-based ultra‑broadband terahertz metamaterial absorber for refractive‑index sensing

A dual-tunable terahertz absorber using graphene-ZnO-VO2 hybrid structure for quad-band absorption, broadband-narrowband switching, and refractive-index sensing

An optimized dual-tunable terahertz (THz) absorber based on a graphene-ZnO-VO 2 hybrid architecture is proposed for tunable absorption, switching, and refractive-index sensing applications. The absorber consists of a connected four-cut graphene resonator integrated with a ZnO dielectric spacer and a VO 2 ground l...

Ultra-Wideband Terahertz Absorption in an All-Graphene Metasurface Enabled by a Mode-Merging Mechanism

Tunable Terahertz Metamaterials from Dual Narrowband Absorption to Broadband Absorption Enabled by Vanadium Dioxide

Conventional terahertz (THz) metamaterial absorbers suffer from fixed electromagnetic responses after structural fabrication, which severely restricts the flexible switching between high-quality-factor narrowband absorption and high-efficiency broadband absorption. To overcome this limitation, a reconfigurable THz me...

Thermally Switchable Broadband Terahertz Metamaterial Absorber Based on VO 2 for Low‐Reflection Absorptive Shielding

Thermally reconfigurable terahertz absorbers are of interest for active electromagnetic control, particularly where broadband absorption and low‐reflection shielding are required. In this work, a VO 2 ‐based thermally switchable metamaterial absorber is numerically investigated in the 1–4 THz range. The proposed un...

Dynamically reconfigurable VO2-based metamaterial absorber with an ultra-broad 11-THz absorption bandwidth

A dynamically reconfigurable, polarization-insensitive terahertz (THz) metamaterial absorber based on phase-change vanadium dioxide (VO2) is proposed and numerically investigated by full-wave simulations (CST Studio Suite). The absorber adopts a simple three-layer configuration: a patterned VO2 resonant layer, a Topas...

Investigation of a Tunable Ultra‐Broadband Terahertz Absorber Based on Composite‐Patterned Monolayer Graphene

This paper proposes an ultra‐broadband terahertz absorber featuring a composite‐patterned monolayer graphene metasurface. By structurally combining a centrally perforated elliptical array with adjacent slotted strips, the absorber achieves a continuous working band from 2.18 to 6.32 THz, with a relative bandwidth of...