title: Fano resonances in dipole-quadrupole plasmon coupling nanorod dimers.
abstract: We theoretically investigate the plasmon coupling in metallic nanorod dimers. A pronounced dip is found in the extinction spectrum due to plasmonic Fano resonance, which is induced by destructive interference between the bright dipole plasmon of a short nanorod and the dark quadrupole plasmon of a long nanorod. This Fano interference can also be explained as the coupling between the bright and dark modes both supported by the whole dimer. The Fano resonance can be tuned by adjusting the spatial or spectral separation between two nanorods in the dimer.
authors.affiliation: Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China.
authors.forename: Zhong-Jian
authors.initials: ZJ
authors.lastname: Yang
authors.forename: Zong-Suo
authors.initials: ZS
authors.lastname: Zhang
authors.forename: Li-Hui
authors.initials: LH
authors.lastname: Zhang
authors.forename: Qun-Qing
authors.initials: QQ
authors.lastname: Li
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Hao
authors.forename: Qu-Quan
authors.initials: QQ
authors.lastname: Wang
mesh_terms: D019281:Dimerization; D043942:Nanotubes / Q000737:chemistry*; D055620:Optical Phenomena