Figure 1.

(a) Schematics of the nanorod metamaterial with a spherical nanoparticle inside. Radius of the nanoparticle is R = 5 nm. Height and radius of the nanorods are H = 350 nm and r = 15 nm, respectively, the period is h = 60 nm. (b) Frequency dependence of the effective tensor components (real parts) of the nanorod metamaterial. Dashed line shows the transition between elliptic and hyperbolic dispersion regimes of the metamaterial – epsilon-near-zero (ENZ) point. Insets show characteristic shapes of iso-frequency surfaces, corresponding to the dispersion regimes.