Figure 3.

(a–c) Diagrams of the meta-atom. Along with the longitude, the materials are VO₂ (R = 1.5 µM, H = 1.5 µM), SiO₂ (T = 1 µM), VO₂ (D = 0.7 µM) and the lattice constant p = 3.5 µM; (d,e) are the electric near field real $\left(E_X\right)$ distribution in the xy-plane and xz-plane; Left and right pillars have radius of 0.5 µM and 1 µM, respectively; (f) The schematic of GSP resonance; (g,h) The electric near field $real\left|E_X\right|$ distribution of VO₂-M in the xy-plane and xz-plane. The electric field in the waveguide is coupled with the surface plasma wave to control the phase gradient of the reflected light.