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Xianzhong Chen, Lingling Huang, Holger Mühlenbernd, Guixin Li, Benfeng Bai, Qiaofeng Tan, Guofan Jin, Cheng-Wei Qiu, Thomas Zentgraf and Shuang Zhang Reversible Three-Dimensional Focusing of Visible Light with Ultrathin Plasmonic Flat Lens Advanced Optical Materials 1

Version of Record online: 26 MAY 2013 | DOI: 10.1002/adom.201300102

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A metalens for visible light is composed of dipole antennas arranged in a number of evenly spaced concentric rings, with the radius of the rings increasing by a step size of 400 nm. The focusing properties of this metalens can be switched between a convex lens and a concave lens by controlling the helicity of the incident light.

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