Highly Efficient Broadband Light Absorber Based on Nonuniform Hyperbolic Metamaterial Film

Figure 4

(Color online) (a) the absorption coefficient (solid lines) of the uniform MM layer of finite thickness nm at normal incidence as a function of the wavelength. Dotted lines show the absorption coefficient for the wave incident onto the metamaterial half-space. The orientation angle is (curve 1), (curve 2), and (curve 3). (b) The ratio for these three cases.

(a)

(b)