Open AccessFanolike resonance due to plasmon excitation in linear chains of metal bumps
Author(s) -
Xiaoxin Yin,
Cheng-ping Huang,
Qianjin Wang,
Wanxia Huang,
Zhen Lin,
Chao Zhang,
Yanyan Zhu
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.010485
Subject(s) - fano resonance , plasmon , optics , excitation , resonance (particle physics) , grating , materials science , surface plasmon , dispersion (optics) , interference (communication) , physics , atomic physics , channel (broadcasting) , electrical engineering , quantum mechanics , engineering
We report the transmission anomaly in a modified slit grating, which is dressed, on the slit sidewalls, with the linear chains of metal bumps. An asymmetric lineshape, which is characteristic of the Fano resonance, has been found in a narrow frequency range of the spectrum. The effect can be attributed to the interference between nonresonant background transmission and resonant plasmonic wave excitation in the linear chains. The dispersion of chain plasmon mode has been suggested, enabling the dynamic tuning of spectral position of the Fano effect.