Comment on "Negative refractive index in artificial metamaterials".
We dispute Grigorenko's statement [Opt. Lett. 31, 2483 (2006)] that measuring only the reflection intensity spectrum is sufficient for determining the effective refractive index. In addition, our simulations do not confirm his conclusions regarding the negative refractive index and the negative permeability of the nanopillar sample in the visible range.
Kildishev
Alexander V
AV
Birk Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA. Kildishev@purdue.edu
Drachev
Vladimir P
VP
Chettiar
Uday K
UK
Shalaev
Vladimir M
VM
Werner
Douglas H
DH
Kwon
Do-Hoon
DH