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Cover Figure


COVER Scheme of a photonic metamaterial composed of three-dimensional gold helices, each about 1.4 micrometers in diameter, fading to an oblique-view electron micrograph of the helices as fabricated (blue). The illuminated spiral symbolizes circularly polarized light impinging on the chiral metamaterial. The structure works as a circular polarizer for a frequency range exceeding one octave. See page 1513). Illustration: Michael S. Rill (structure fabrication by Justyna K. Gansel and Michael Thiel)

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Science. ISSN 0036-8075 (print), 1095-9203 (online)