School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States.
Nano Lett. 2014 May 14;14(5):2479-84. doi: 10.1021/nl500158y. Epub 2014 Apr 6.
We introduce far-infrared graphene plasmonic crystals. Periodic structural perturbation-in a proof-of-concept form of hexagonal lattice of apertures-of a continuous graphene medium alters delocalized plasmonic dynamics, creating plasmonic bands in a manner akin to photonic crystals. Fourier transform infrared spectroscopy demonstrates band formation, where far-infrared irradiation excites a unique set of plasmonic bands selected by phase matching and symmetry-based selection rules. This band engineering may lead to a new class of graphene plasmonic devices.
我们介绍了远红外石墨烯等离子体晶体。周期性结构的微扰——以六边形孔阵的概念验证形式——改变了连续石墨烯介质中离域等离子体动力学，以类似于光子晶体的方式产生等离子体带。傅里叶变换红外光谱证明了带的形成，其中远红外辐照激发了一组独特的等离子体带，这些带是通过相位匹配和基于对称性的选择规则选择的。这种能带工程可能会导致一类新的石墨烯等离子体器件。
