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Caption: Circularly polarized dipole over a metal surface, exciting surface plasmons unidirectionally. The height of the metal surface represents the surface charge density. This image relates to a paper that appeared in the April 19, 2013, issue of Science, published by AAAS. The paper, by Francisco Rodríguez-Fortuño at King's College London in London, UK, and colleagues was titled, "Near-Field Interference for the Unidirectional Excitation of Electromagnetic Guided Modes."
Credit: [Image courtesy of Francisco J. Rodríguez-Fortuño]
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