Applications of Hyperbolic Metamaterial Substrates
Figure 4
(a) Transmission of waves through a multilayer realization consisting of silver-tio2 layers each of 10 nm thickness (total 16 layers) including loss and dispersion. The high- modes are seen to tunnel across the layers. (b) In the effective medium limit, there are infinitely many high- waves in the type I and type II HMM. Notice that there is no upper cutoff in the effective medium limit, but in the multilayer realization, the size of the unit cell imposes a strict upper limit to tunneling ( is the free space wavevector).
