Fano resonances in nanoscale plasmonic structure

Yundong Zhang; Hui Li; Yongfeng Wu; Xuenan Zhang

doi:10.1117/12.2186364

28 August 2015 Fano resonances in nanoscale plasmonic structure

Yundong Zhang, Hui Li, Yongfeng Wu, Xuenan Zhang

Proceedings Volume 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII; 95472J (2015) https://doi.org/10.1117/12.2186364
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

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 method, which consists of a metal-insulator-metal waveguide coupled with a circle and a disk 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.

Citation Download Citation

Yundong Zhang, Hui Li, Yongfeng Wu, and Xuenan Zhang "Fano resonances in nanoscale plasmonic structure", Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95472J (28 August 2015); https://doi.org/10.1117/12.2186364

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