Kravets V G, Jalil R, Kim Y-J, Ansell D, Aznakayeva D E, Thackray B, Britnell L, Belle B D, Withers F, Radko I P, Han Z, Bozhevolnyi S I, Novoselov K S, Geim A K, Grigorenko A N
School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK.
1] School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK [2] Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 151-747, Korea.
Sci Rep. 2014 Jul 1;4:5517. doi: 10.1038/srep05517.
Plasmonics has established itself as a branch of physics which promises to revolutionize data processing, improve photovoltaics, and increase sensitivity of bio-detection. A widespread use of plasmonic devices is notably hindered by high losses and the absence of stable and inexpensive metal films suitable for plasmonic applications. To this end, there has been a continuous search for alternative plasmonic materials that are also compatible with complementary metal oxide semiconductor technology. Here we show that copper and silver protected by graphene are viable candidates. Copper films covered with one to a few graphene layers show excellent plasmonic characteristics. They can be used to fabricate plasmonic devices and survive for at least a year, even in wet and corroding conditions. As a proof of concept, we use the graphene-protected copper to demonstrate dielectric loaded plasmonic waveguides and test sensitivity of surface plasmon resonances. Our results are likely to initiate wide use of graphene-protected plasmonics.
等离子体激元学已成为物理学的一个分支，有望彻底改变数据处理、改进光伏技术并提高生物检测的灵敏度。等离子体激元器件的广泛应用尤其受到高损耗以及缺乏适用于等离子体激元应用的稳定且廉价金属薄膜的阻碍。为此，人们一直在不断寻找与互补金属氧化物半导体技术兼容的替代等离子体激元材料。在此，我们表明由石墨烯保护的铜和银是可行的候选材料。覆盖有一到几层石墨烯的铜膜展现出优异的等离子体激元特性。它们可用于制造等离子体激元器件，并且即使在潮湿和腐蚀环境中也能存活至少一年。作为概念验证，我们使用石墨烯保护的铜来演示介质加载的等离子体激元波导并测试表面等离子体共振的灵敏度。我们的结果可能会引发石墨烯保护的等离子体激元学的广泛应用。
