Asymmetric hyperbolic metamaterials
Optically thin absorbers, based on asymmetric hyperbolic metamaterials:
If an optical axis of the hyperbolic metamaterial is tilted with respect
to the interfaces of a planar slab, it exhibits asymmetry in the properties of waves propagating upward
and downward with respect to the interfaces. Under an approppriate choice of the material parameters
it results in a very large wave attenuation constant under perfect matching of the
layer with free space.
I. Nefedov, C. Valagiannopoulos, S. Hashemi, and E. Nefedov, "Total absorption in asymmetric hyperbolic media," Scientific Reports, vol. 3,
no. 2662, p. 2662, 2013
Asymmetric hyperbolic media can be fabricated from different materials such as aligned carbon nanotubes,
graphene, noble and some other metals.
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