Below are several publications that have contributed to the recent interest in metamaterials and in negative refractive index. While many of the concepts contained in these papers can be found in earlier works, these papers in particular have been highly cited in the most recent metamaterial developments. These publications can therefore be considered important background reading.

• The electrodynamics of substances with simultaneously negative values of [permittivity] and [permeability]

V. G. Veselago, Soviet Physics USPEKI, 10, 509 (1968)

• Magnetism from conductors and enhanced nonlinear phenomena

J. B. Pendry, A. J. Holden, D. J. Robbins and W. J. Stewart, IEEE Trans. Micr. Theory and Techniques, 47, 2075 (1999)

• Extremely low frequency plasmons in metallic mesostructures

J. B. Pendry, A. J. Holden, W. J. Stewart and I. Youngs Phys. Rev. Lett., 76, 4773 (1996)

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