%0 Journal Article %T An electromagnetic trinity from "negative permittivity" and "negative permeability" %A Akhlesh Lakhtakia %J Physics %D 2001 %I arXiv %X An electromagnetic trinity comprising vacuum, anti--vacuum, and nihility is postulated -- after making use of materials with "negative permittivity" and "negative permeability" -- to illuminate the structure of electromagnetic theory, at least insofar as the relationship of phase velocity with Poynting vector is concerned. %U http://arxiv.org/abs/physics/0112003v1