Multi-mode resonance properties of two-dimensional metal-dielectric-metal fishnet metasurface at visible wavelengths

Abstract

We experimentally and numerically investigate the multiple types of resonance modes that occur in a metal-dielectric-metal (MDM) fishnet metasurface, including magnetic plasmon polaritons, localized surface plasmon resonance, and surface plasmon polariton-Bloch waves in the visible spectral range. The parametric dependences of the multiple resonant wavelengths are all carefully analyzed by varying the gap layer thickness, the period and the neck length of the fishnet structure. Using our knowledge of the geometric parameter dependences, we demonstrate the feasibility of shaping the transmission spectrum of the MDM fishnet metasurface based on control of the light polarization. Numerical simulations are performed and their results coincide perfectly with the experimental results, which indicate that the magnetic mode is more easily tunable than the other modes. Our research will be useful in the design of MDM fishnet structures for specific applications at visible frequencies, including color filters, sensors, color light-emitting devices, and laser sources.