Fresnel equations and the refractive index of active media.

  • Johannes Skaar
  • Published 2006 in
    Physical review. E, Statistical, nonlinear, and…


A class of realizable active media exists for which the refractive index cannot be defined as an analytic function in the upper half-plane of complex frequency. The conventional definition of the refractive index based on analyticity is modified such that it is valid for active media in general, and associated Fresnel equations are proved. In certain active… (More)

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