Symmetry breaking induced excitations of dark plasmonic modes in multilayer graphene ribbons
Symmetry breaking induced excitations of dark plasmonic modes in multilayer graphene ribbons
复制标题
对称性破缺诱导多层石墨烯带中暗等离子体模式的激发
DOI：
10.1364/oe.24.020021
复制
发表时间：
2016-09-05
期刊：
影响因子：
3.8
通讯作者：
Zi, J.
中科院分区：
文献类型：
--
作者：
Dai, Y. Y.;Chen, A.;Zi, J.
多层石墨烯可以支持多个等离子体激元带。如果结构成石墨烯带，它们可以支持多种局域等离子体模，具有有趣的光学性质。然而，由于结构对称性的限制，并不是所有的等离子体模都能被直接激发。数值模拟表明，通过打破对称性，所有的等离子体模都可以被激发。我们讨论了两层石墨烯带的一般原理和性质，然后将其扩展到多层石墨烯带。在不同宽度的多层石墨烯中，由于所有等离子体模的激发，可以获得可调谐的宽带吸收。我们的结果表明，这些对称性破缺的多层石墨烯薄带可以在设计光子器件时提供更多的自由度。(C)2016年度美国光学学会
Multilayer graphene can support multiple plasmon bands. If structured into graphene ribbons, they can support multiple localized plasmonic modes with interesting optical properties. However, not all such plasmonic modes can be excited directly due to the constrains of the structural symmetry. We show by numerical simulations that by breaking the symmetry all plasmonic modes can be excited. We discuss the general principles and properties of two-layer graphene ribbons and then extend to multilayer graphene ribbons. In multilayer graphene ribbons with different ribbon widths, a tunable broadband absorption can be attained due to the excitations of all plasmonic modes. Our results suggest that these symmetry-broken multilayer graphene ribbons could offer more degrees of freedom in designing photonic devices. (C) 2016 Optical Society of America