Figure 3: (a) Dispersion of the dielectric constants in a practical multilayer semiconductor realization of the HMM. Note the broadband region in which type I HMM response is achieved. (b) Exact numerical calculation (neglecting loss) in the multilayer structure showing the Bloch high- mode and coupled surface plasmons at the interfaces. (c) Evanescent wave incident on an effective medium slab couples to the high- mode and is transmitted. In contrast, the evanescent wave decays away in vacuum.