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|Title:||Dual-polarity plasmonic metalens for visible light|
|Source:||Chen, X., Huang, L., Mühlenbernd, H., Li, G., Bai, B., Tan, Q., Jin, G., Qiu, C.-W., Zhang, S., Zentgraf, T. (2012). Dual-polarity plasmonic metalens for visible light. Nature Communications 3 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms2207|
|Abstract:||Surface topography and refractive index profile dictate the deterministic functionality of a lens. The polarity of most lenses reported so far, that is, either positive (convex) or negative (concave), depends on the curvatures of the interfaces. Here we experimentally demonstrate a counter-intuitive dual-polarity flat lens based on helicity-dependent phase discontinuities for circularly polarized light. Specifically, by controlling the helicity of the input light, the positive and negative polarity are interchangeable in one identical flat lens. Helicity-controllable real and virtual focal planes, as well as magnified and demagnified imaging, are observed on the same plasmonic lens at visible and near-infrared wavelengths. The plasmonic metalens with dual polarity may empower advanced research and applications in helicity-dependent focusing and imaging devices, angular-momentum-based quantum information processing and integrated nano-optoelectronics. © 2012 Macmillan Publishers Limited. All rights reserved.|
|Source Title:||Nature Communications|
|Appears in Collections:||Staff Publications|
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