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A bimetallic nanoantenna for directional colour routing

renchunxiao 添加于 2011/9/26 11:16:26  2339次阅读 | 0次推荐 | 0个评论

Recent progress in nanophotonics includes demonstrations of meta-materials displaying negative refraction at optical frequencies, directional single photon sources, plasmonic analogies of electromagnetically induced transparency and spectacular Fano resonances. The physics behind these intriguing effects is to a large extent governed by the same single parameter—optical phase. Here we describe a nanophotonic structure built from pairs of closely spaced gold and silver disks that show phase accumulation through material-dependent plasmon resonances. The bimetallic dimers show exotic optical properties, in particular scattering of red and blue light in opposite directions, in spite of being as compact as ~λ3/100. These spectral and spatial photon-sorting nanodevices can be fabricated on a wafer scale and offer a versatile platform for manipulating optical response through polarization, choice of materials and geometrical parameters, thereby opening possibilities for a wide range of practical applications.

作 者:Timur Shegai; Si Chen; Vladimir D. Miljković; Gülis Zengin; Peter Johansson; Mikael Käll
期刊名称: Nature Communications
期卷页: 2011-09-20 第2卷 第期 481~页
学科领域:数理科学 » 物理学 » 光学
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原文链接:http://www.nature.com/ncomms/journal/v2/n9/full/ncomms1490.html
DOI: doi:10.1038/ncomms1490
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关键词: Physical Sciences, Metals, Modelling and theory, Nanotechnology, Optical materials and devices
相关报道: http://paper.sciencenet.cn/htmlpaper/20119261120922919580.shtm
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