Fig. 1. Plane metamaterial structure sensor. (a) Sensing diagram; (b), (c) Unit structure parameter diagram; (d) Microscopic image

Fig. 2. Metamaterial sensor. (a) Surface current; (b) Simulation and experimental transmission spectrum

Fig. 3. (a) Transmission of metamaterial sensor with different thickness of analyte under the refractive index of 1.6;(b) Relationship between the resonant frequency of transmission and the thickness of analyte in Fig.3(a)

Fig. 4. (a) Transmission of metamaterial sensor with different refractive index of analyte under the thickness of 12 μm;(b) Relationship between the resonant frequency of transmission and the refractive index of analyte in Fig.4(a)

Fig. 5. (a) Metamaterial sensor fixed on PET; (b) Transmission spectrum of different analyte sensors