Left-Handed But Not in Left Field

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Science  28 Mar 2003:
Vol. 299, Issue 5615, pp. 1947
DOI: 10.1126/science.299.5615.1947b

Two years ago, an experiment was devised using a combination of dielectric and conductive elements put together in a specific geometry such that the material would possess negative electric permittivity and magnetic permeability. The result was a demonstration that microwaves entering the material were refracted according to Snell's law, but in the opposite direction to that for “normal” materials, thus confirming an idea first proposed in 1968. Lively discussion ensued, however, about whether these materials really could exist and exhibit these observed properties without breaking the laws of physics. That debate now appears to be put to rest. Several talks at the March meeting of the American Physical Society and the experimental evidence provided by Parazzoli et al. with the simulation work of Foteinopoulou et al. together provide strong evidence supporting the existence of negative index of refraction (also called left-handed) materials. — ISO

Phys. Rev. Lett. 90, 107401; 107402 (2003).

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