Using a Semiconductor-to-Metal Transition to Control Optical Transmission through Subwavelength Hole Arrays

Figure 2

(Color online) experimental zero-order transmission spectra, in each $\text{V}{\text{O}}_2$ phase, for perforated double layers in: (a) $\text{A}\text{g}\text{−}\text{V}{\text{O}}_2$, with $(\text{i}\text{n}\text{s}\text{e}\text{t})$ its reverse hysteresis at $\lambda =800\text{n}\text{m}$ (normalized to the highest transmission in the metallic phase of the $\text{V}{\text{O}}_2$ layer; upward/downward arrow denotes the heating/cooling part of the thermal cycle; cf, regular hysteresis in Figure 3(d)), (b) $\text{Au}\text{−}\text{V}{\text{O}}_2$, (c) demonstration of the spectral splitting of the Wood’s anomaly minima with deviation from the normal ($0^{°}$) angle of incidence (lower/upper set of three curves corresponds to the semiconducting/metallic phase of the $\text{V}{\text{O}}_2$ layer in the $\text{A}\text{g}\text{−}\text{V}{\text{O}}_2$ hole array).