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1 September 2015 Mid-infrared hyperbolic metamaterial based on graphene-dielectric multilayers
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Graphene-based hyperbolic metamaterials (HMMs) enable new possibilities that are not attainable with conventional metal-based HMMs, such as tunability of optical properties and the ability to combine with graphene-based photodetection. A graphene HMM is made of alternating graphene-dielectric multilayers, whose properties can be understood with the effective-medium approximation (EMA). The initial experimental realization of this novel metamaterial has been demonstrated with a far-field measurement, and in this paper we investigate the light coupling from free space into a graphene HMM slab with a metallic grating using numerical simulations. We show that light can be efficiently coupled into the high-k guided modes in the HMM slab and be absorbed by the graphene layers, which can be applied to create ultrathin super absorbers.
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You-Chia Chang, Alexander V. Kildishev, Evgenii E. Narimanov, Che-Hung Liu, Chang-Hua Liu, Siyuan Zhang, Seth R. Marder, Zhaohui Zhong, and Theodore B. Norris "Mid-infrared hyperbolic metamaterial based on graphene-dielectric multilayers", Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 954417 (1 September 2015);

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