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Robust and reconfigurable surface lattice resonance in Ag tetramer array/VO2 hybrid plasmonic metasurfaces
Optics Express
|August 14, 2026
Summary
Researchers developed a tunable metasurface using silver and vanadium dioxide to create a robust surface lattice resonance (SLR). This breakthrough enables efficient optical switches and reconfigurable displays with high modulation depth.
Area of Science:
- Metasurface optics
- Nanophotonics
- Plasmonics
Background:
- Static dielectric resonant metaphotonics is mature, but reconfigurable metasurfaces face design and fabrication challenges.
- Phase change materials (PCMs) offer a promising route for tunable metasurface design.
Purpose of the Study:
- To report a reconfigurable surface lattice resonance (SLR) in a hybrid metasurface.
- To investigate the tunability and robustness of the SLR for potential applications.
Main Methods:
- Fabrication of a hybrid metasurface comprising Ag tetramer arrays, a thin VO2 layer, and an Al mirror.
- Excitation of SLR via diffractive coherent coupling of localized surface plasmon resonance (LSPR).
- Analysis of scattered power, multipole contributions, and near-field distributions.
Main Results:
- A narrow Fano resonance in the reflective spectra response was observed, dominated by electric dipoles.
- The SLR's reflection spectral response was dynamically tuned using the phase transition of VO2, achieving 82.5% modulation depth.
- The SLR exhibited robustness against structural variations and polarization orientation.
Conclusions:
- The hybrid metasurface demonstrates a highly tunable and robust SLR.
- This technology holds potential for applications in optical switches, memories, thermal photovoltaics, tunable photodetectors, and reconfigurable displays.
