Kramers-Kronig relations and sum rules of negative refractive index media

K.-E. Peiponen (), V. Lucarini, E. Vartiainen and J. Saarinen ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 41, issue 1, 61-65

Abstract: Negative refractive index media have become a hot topic in physics due to their proposed revolutionary properties, which would have drastic consequences in design of novel optical devices. We show that Kramers-Kronig relations connecting the real and imaginary parts of the complex refractive index of absorbing media are valid even though the real refractive index may take negative value at some spectral range. In addition universal sum rules for linear optical constants of negative index media are also valid. This means that negative refractive index media are not fundamentally different from regular media. Hence, any spectrum measured from negative refractive index media can be analyzed using dispersion relations and sum rules, which have so far provided information on the optical properties of materials. Copyright Springer-Verlag Berlin/Heidelberg 2004

Date: 2004
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DOI: 10.1140/epjb/e2004-00294-6

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