title: Tuning gold nanorod-nanoparticle hybrids into plasmonic Fano resonance for dramatically enhanced light emission and transmission.
abstract: We investigate the optical response of a gold nanorod array coupled with a semicontinuous nanoparticle film. We find that, as the gold nanoparticle film is adjusted to the percolating regime, the nanorod-film hybrids are tuned into plasmonic Fano resonance, characterized by the coherent coupling of discrete plasmonic modes of the nanorod array with the continuum band of the percolating film. Consequently, optical transmission of the percolating film is substantially enhanced. Even more strikingly, electromagnetic fields around the nanorod array become much stronger, as reflected by 2 orders of magnitude enhancement in the avalanche multiphoton luminescence. These findings may prove instrumental in the design of various plasmonic nanodevices.
authors.affiliation: Department of Physics, Wuhan University, Wuhan 430072, People's Republic of China.
authors.forename: Zhang-Kai
authors.initials: ZK
authors.lastname: Zhou
authors.forename: Xiao-Niu
authors.initials: XN
authors.lastname: Peng
authors.forename: Zhong-Jian
authors.initials: ZJ
authors.lastname: Yang
authors.forename: Zong-Suo
authors.initials: ZS
authors.lastname: Zhang
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Xiong-Rui
authors.initials: XR
authors.lastname: Su
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xinyan
authors.initials: X
authors.lastname: Shan
authors.forename: Qu-Quan
authors.initials: QQ
authors.lastname: Wang
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Zhang