Flux control in inhomogeneous anisotropic epsilon-near-zero metamaterials

We study wave propagation in inhomogeneous anisotropic metamaterials with one component of its effective permittivity tensor nearly zero. We find that such a type of metamaterials can achieve a high transmission rate and control the energy flow at will simultaneously. This originates in the efficient energy redistribution by evanescent waves. Such a property can be utilized to construct bending waveguides with unusually high transmission rates. Numerical calculations have been performed to confirm the above effects.