UC San Diego physicists have devised a composite material in which the effective electrical permittivity, and the magnetic permeability are both negative. This leads to bizarre optical properties.
a) A top view of the experimental setup. Microwaves enter a cavity from the left. They fall on the composite material, consisting of alternating rows of rods and thin copper patterned disks (1 cm in diameter).
b) A sideview of the microwaves hitting the composite material.
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Reported by: David Smith, Sheldon Schulz et al., at the APS March Meeting in Minneapolis on March 21.