title: Fanolike resonance due to plasmon excitation in linear chains of metal bumps.
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.
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Xiao-gang
authors.initials: XG
authors.lastname: Yin
authors.forename: Cheng-ping
authors.initials: CP
authors.lastname: Huang
authors.forename: Qian-jin
authors.initials: QJ
authors.lastname: Wang
authors.forename: Wan-xia
authors.initials: WX
authors.lastname: Huang
authors.forename: Lin
authors.initials: L
authors.lastname: Zhou
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Yong-yuan
authors.initials: YY
authors.lastname: Zhu