Anisotropic enhancement of group velocity in a homogenized dielectric composite medium

Tom G. Mackay, Akhlesh Lakhtakia

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Under certain circumstances, the group velocity in a homogenized composite medium (HCM) can exceed the group velocity in its component material phases. This phenomenon is explored for a uniaxial dielectric HCM comprising isotropic component material phases distributed as oriented spheroidal particles. The theoretical approach is based upon the Bruggeman homogenization formalism. Enhancement in group velocity in the HCM with respect to the component material phases turns out to be sensitively dependent upon the shape of the component spheroids and their alignment relative to the direction of propagation.

Original languageEnglish (US)
Pages (from-to)669-674
Number of pages6
JournalJournal of Optics A: Pure and Applied Optics
Issue number11
StatePublished - Nov 1 2005


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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