On the inapplicability of a negative-phase-velocity condition as a negative-refraction condition for active materials

Akhlesh Lakhtakia, Tom G. Mackay, Joseph B. Geddes

Research output: Contribution to journalArticle

9 Scopus citations


A negative-phase-velocity condition derived by Depine and Lakhtakia (Microwave Opt Technol Lett 41 (2004) 315-317) for isotropic, homogeneous, passive, dielectric-magnetic materials is inapplicable as a negative-refraction condition for active materials.

Original languageEnglish (US)
Number of pages1
JournalMicrowave and Optical Technology Letters
Issue number5
StatePublished - May 1 2009


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this