期刊
NANOMATERIALS
卷 8, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano8080568
关键词
Au ring-strip nanosystem; multipolar Fano resonances; surface plasmon resonances; FDTD method
类别
资金
- National Natural Science Foundation of China [51606158, 11604311]
- Longshan academic talent research supporting program of SWUST [18lzx506]
Surface plasmon resonances of a Au ring-strip nanosystem with tunable multipolar Fano resonances have been investigated based on the finite-difference time-domain (FDTD) method. Abundant plasmon properties of a Au ring-strip nanosystem can be obtained on the basis of the unique electronic properties of different geometry parameters. In our research models, these multipolar Fano resonances are induced and can be tuned independently by changing the geometry parameters of the Au ring-strip nanosystem. Complex electric field distributions excited by the Au ring-strip nanosystem provide possibility to form dark plasmonic modes. Multipolar Fano resonances display strong light extinction in the Au ring-strip nanosystem, which can offer a new approach for an optical tunable filter, optical switching, and advanced biosensing.
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