Xiao-gang Yin, Cheng-ping Huang, Qian-jin Wang, Wan-xia Huang, Lin Zhou, Chao Zhang, and Yong-yuan Zhu
Optics Express, Vol. 19, Issue 11, pp. 10485-10493 (2011)
http://dx.doi.org/10.1364/OE.19.010485
Abstract
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. |