17 September 2016 Fano resonances based on nanoscale plasmonic structure
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Abstract
The interaction between plasmonic resonances, sharp modes, and light in nanoscale plasmonic systems often leads to Fano interference effects. This occurs because the plasmonic excitations are usually spectrally broad and the characteristic narrow asymmetric Fano line-shape results upon interaction with spectrally sharper modes. We investigate a plasmonic waveguide system using the finite-difference time-domain (FDTD) method, which consists of a metal-insulator-metal waveguide coupled with a rectangle and a ring cavity. Numerical simulations results show that the sharp and asymmetric Fano-line shapes can be created in the waveguide. Fano resonance strongly depends on the structural parameters. This has important applications in highly sensitive and multiparameter sensing in the complicated environments.
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Yundong Zhang, Hui Li, Yongfeng Wu, Changqiu Yu, Ping Yuan, "Fano resonances based on nanoscale plasmonic structure", Proc. SPIE 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV, 99212F (17 September 2016); doi: 10.1117/12.2237138; https://doi.org/10.1117/12.2237138
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