Inductive Tuning of Fano-Resonant Metasurfaces Using Plasmonic Response of Graphene in the Mid-Infrared

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• 作者：S. Hossein Mousavi ; Iskandar Kholmanov ; Kamil B. Alici ; David Purtseladze ; Nihal Arju ; Kaya Tatar ; David Y. Fozdar ; Ji Won Suk ; Yufeng Hao ; Alexander B. Khanikaev ; Rodney S. Ruoff ; Gennady Shvets
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：13
• 期：3
• 页码：1111-1117
• 全文大小：439K
• 年卷期：v.13,no.3(March 13, 2013)
• ISSN：1530-6992

文摘

Graphene is widely known for its anomalously strong broadband optical absorptivity of 2.3% that enables seeing its single-atom layer with the naked eye. However, in the mid-infrared part of the spectrum graphene represents a quintessential lossless zero-volume plasmonic material. We experimentally demonstrate that, when integrated with Fano-resonant plasmonic metasurfaces, single-layer graphene (SLG) can be used to tune their mid-infrared optical response. SLG鈥檚 plasmonic response is shown to induce large blue shifts of the metasurface鈥檚 resonance without reducing its spectral sharpness. This effect is explained by a generalized perturbation theory of SLG-metamaterial interaction that accounts for two unique properties of the SLG that set it apart from all other plasmonic materials: its anisotropic response and zero volume. These results pave the way to using gated SLG as a platform for dynamical spectral tuning of infrared metamaterials and metasurfaces.

Keywords:

Graphene; Fano resonances; optical modulation; plasmonic metamaterials; mid-infrared