Homogeneous, isotropic mediums characterized by relative permittivity scalars ∈ = ∈R + i∈I (∈R, ∈ I ∈ R) and relative permeability scalars μ= μR + iμI (μR, μI μR μRR) are well known to support the propagation of plane waves with negative phase velocity (NPV), provided that both μR < 0 and μR < 0, We demonstrate that mediums which do not support NPV propagation when viewed at rest (e.g., mediums with μR > 0 and μR > 0), can support NPV propagation when they are viewed in a reference frame which is uniformly translated at a sufficiently high velocity. Representative numerical examples are used to explore the constitutive parameter regimes which support NPV propagation under the uniform-velocity condition.
All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Mathematical Physics
- Physics and Astronomy(all)