Sign of the refractive index in a gain medium with negative permittivity and permeability
JOSA B, Vol. 23, Issue 1, pp. 45-50 (2006)
http://dx.doi.org/10.1364/JOSAB.23.000045
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Abstract
We show how the sign of the refractive index in any medium may be derived using a rigorous analysis based on Einstein causality. In particular, we consider left-handed materials, i.e., media that have negative permittivities and permeabilities at the frequency of interest. We find that the consideration of gain in such media can give rise to a positive refractive index.
© 2006 Optical Society of America
OCIS Codes
(000.2690) General : General physics
(350.7420) Other areas of optics : Waves
ToC Category:
Metamaterials
Citation
Yi-Fan Chen, Peer Fischer, and Frank W. Wise, "Sign of the refractive index in a gain medium with negative permittivity and permeability," J. Opt. Soc. Am. B 23, 45-50 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-1-45
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