Planar Metamaterial Analogue of Electromagnetically Induced Transparency for Plasmonic Sensing

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• 作者：Na Liu ; Thomas Weiss ; Martin Mesch ; Lutz Langguth ; Ulrike Eigenthaler ; Michael Hirscher ; Carsten Snnichsen ; Harald Giessen
• 刊名：Nano Letters
• 出版年：2010
• 出版时间：April 14, 2010
• 年：2010
• 卷：10
• 期：4
• 页码：1103-1107
• 全文大小：337K
• 年卷期：v.10,no.4(April 14, 2010)
• ISSN：1530-6992

文摘

We experimentally demonstrate a planar metamaterial analogue of electromagnetically induced transparency at optical frequencies. The structure consists of an optically bright dipole antenna and an optically dark quadrupole antenna, which are cut-out structures in a thin gold film. A pronounced coupling-induced reflectance peak is observed within a broad resonance spectrum. A metamaterial sensor based on these coupling effects is experimentally demonstrated and yields a sensitivity of 588 nm/RIU and a figure of merit of 3.8.