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Comment on "Wave Refraction in Negative-Index Media: Always Positive and Very Inhomogeneous"

JB Pendry·D. R. Smith
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Abstract

In a recent Physical Review Letter [1] Valanju Walser and Valanju (VWV) called into question the basis of work on the so called negative index media (NIM). See for example [2,3]. The key point at issue is, `what is the group velocity of a wave in NIM?'

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JB Pendry, D. R. Smith. 2002-06-28. Comment on "Wave Refraction in Negative-Index Media: Always Positive and Very Inhomogeneous". https://doi.org/10.1103/physrevlett.90.029703

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