Electromagnetic multipole resonance-driven metasurface for high-performance multi-channel refractive index sensing in the near-infrared.
Metasurfaces with the remarkable ability to regulate electromagnetic waves play an increasingly important role in optical and optoelectronic systems. In this study, we theoretically propose a metasurface consisting of four fan-shaped nanorod periodic arrays, which achieves multi-channel near-infrared absorption via ele...