Realization of mid-infrared graphene hyperbolic metamaterials

You-Chia Chang, Che Hung Liu, Chang Hua Liu, Siyuan Zhang, Seth R. Marder, Evgenii E. Narimanov, Zhaohui Zhong, Theodore B. Norris*

*此作品的通信作者

研究成果: Article同行評審

201 引文 斯高帕斯(Scopus)

摘要

While metal is the most common conducting constituent element in the fabrication of metamaterials, graphene provides another useful building block, that is, a truly two-dimensional conducting sheet whose conductivity can be controlled by doping. Here we report the experimental realization of a multilayer structure of alternating graphene and Al2O3 layers, a structure similar to the metal-dielectric multilayers commonly used in creating visible wavelength hyperbolic metamaterials. Chemical vapour deposited graphene rather than exfoliated or epitaxial graphene is used, because layer transfer methods are easily applied in fabrication. We employ a method of doping to increase the layer conductivity, and our analysis shows that the doped chemical vapour deposited graphene has good optical properties in the mid-infrared range. We therefore design the metamaterial for mid-infrared operation; our characterization with an infrared ellipsometer demonstrates that the metamaterial experiences an optical topological transition from elliptic to hyperbolic dispersion at a wavelength of 4.5 μm.

原文English
文章編號10568
期刊Nature Communications
7
DOIs
出版狀態Published - 4 2月 2016

指紋

深入研究「Realization of mid-infrared graphene hyperbolic metamaterials」主題。共同形成了獨特的指紋。

引用此