Highly Efficient Broadband Light Absorber Based on Nonuniform Hyperbolic Metamaterial Film

Figure 5

(Color online) the absorption coefficient of the nonuniform metamaterial film as a function of the (a) wavelength (at normal incidence) and (b) tangential wavevector component of the incident light (nm); the thickness of the film is nm (curve 1), nm (curve 2), and nm (curve 3). Dotted line is the absorption coefficient of the metamaterial half-space.

(a)

(b)