Before revision: Spoof surface plasmons, also known as spoof surface plasmon polaritons , are surface electromagnetic waves in microwave and terahertz regimes that propagate along planar interfaces with sign-changing permittivities.
After revision: and designer surface plasmonsSpoof surface plasmons, also known as spoof surface plasmon polaritons , are surface electromagnetic waves in microwave and terahertz regimes that propagate along planar interfaces with sign-changing permittivities.