Highly Efficient Broadband Light Absorber Based on Nonuniform Hyperbolic Metamaterial Film

Figure 3

(Color online) the reflection coefficient at normal incidence as a function of the angle (see text). The dashed line indicates the specific angle , at which the resonance cone generatrix is parallel to . Lines 1, 2, and 3 correspond to the reflection from the uniform MM film (placed on the perfectly reflecting substrate) with the thickness nm, nm, and nm, and the line 4 corresponds to the reflection from the HM half-space. The wavelength of the radiation is 500 nm.