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Article | REF: AF3713 V2

Electromagnetical and Optical Metamaterials

Author: André DE LUSTRAC

Publication date: July 10, 2016, Review date: March 11, 2021

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2. Principles and properties

2.1 Negative optical index material

As early as 1967, V.G. Veselago showed theoretically that a medium with simultaneously negative permittivity and permeability had a negative refractive index . This negative index arose from the electromagnetic refraction properties observed at the interface between a positive-index medium with relative permittivity εr

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