期刊
PLASMONICS
卷 8, 期 2, 页码 797-801出版社
SPRINGER
DOI: 10.1007/s11468-012-9475-9
关键词
Surface plasmon polariton; Fano resonance; Gear-shaped nanocavity; Finite-difference time-domain method
资金
- National Natural Foundation of China [11004160, 10974161]
- Southwest Jiaotong University
The filter function of the metal-insulator-metal (MIM) waveguide with a gear-shaped nanocavity is investigated using the finite-difference time-domain method. Since the gear breaks the symmetric distribution of the resonance, Fano resonance occurs in the gear-shaped nanocavity. Fano resonance strongly depends on the structural parameters of the gear. Compared to the MIM waveguide with a disk-shaped nanocavity, the MIM waveguide with a gear-shaped nanocavity allows for a much more sensitive detection of small refractive index changes of the filled media inside the nanocavity, which reveals a potential sensor application of the MIM waveguide with a gear-shaped nanocavity.
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