Applications of Hyperbolic Metamaterial Substrates

Figure 1

𝑘-Space topology. (a) The isofrequency contour for an isotropic dielectric is a sphere. For extraordinary waves in an extremely anisotropic uniaxial medium, the isofrequency contour becomes a hyperboloid which supports waves with unbounded wavevectors, in stark contrast to an isotropic medium. (b) A type 1 HMM has one component of the dielectric tensor negative (𝜀_𝑥𝑥=𝜀_𝑦𝑦>0 and 𝜀_𝑧𝑧<0) and supports low-𝑘and high-𝑘waves. (c) A type 2 HMM has two components of the dielectric tensor negative (𝜀_𝑥𝑥=𝜀_𝑦𝑦<0 and 𝜀_𝑧𝑧>0) and only supports high-𝑘 waves.

(a)

(b)

(c)