Optical refraction in silver: Counterposition, negative phase velocity and orthogonal phase velocity

Qaisar A. Naqvi, Tom G. MacKay, Akhlesh Lakhtakia

Research output: Contribution to journalArticle

8 Scopus citations


Complex behaviour associated with metamaterials can arise even in commonplace isotropic dielectric materials. We demonstrate how silver, for example, can support negative phase velocity and counterposition, but not negative refraction, at optical frequencies. The transition from positive to negative phase velocity is not accompanied by remarkable changes in the Abraham and Minkowski momentum densities. In particular, orthogonal phase velocity is associated with nonzero Abraham and Minkowski momentum densities.

Original languageEnglish (US)
Pages (from-to)883-893
Number of pages11
JournalEuropean Journal of Physics
Issue number4
Publication statusPublished - Jul 2011


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this