Design and simulation verification an environmental change metamaterial sensor

We designed and simulated a composite structure metamaterial absorber involving a metal particles array embedded in the dielectric layer. An absorption peak (83%) is achieved at 703 nm which is excited by the local surface plasmon (LSP) modes resonance between metal particles and the metal bottom substrate. Simulated results indicate that the absorption property of the metamaterial absorber can be modulated through optimizing the horizontal distance between metal particles. The electric field enhancement effect is found between metal particles and the metal substrate, which leads to the absorption property enhanced. The electric field intensity of LSP modes of the proposed structure is higher than that of the pure metal particles structure. The electric field enhancement factor is adopted to reveal the electric field enhanced effect. The application of the metamaterial absorber is revealed based on the figure of merit (FOM) value.