Tuning gold nanorod-nanoparticle hybrids into plasmonic Fano resonance for dramatically enhanced light emission and transmission.
Tuning gold nanorod-nanoparticle hybrids into plasmonic Fano resonance for dramatically enhanced light emission and transmission.
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DOI：
10.1021/nl1026869
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发表时间：
2011-01
期刊：
影响因子：
10.8
通讯作者：
Zhangkai Zhou;Xiao-niu Peng;Zhongjian Yang;Zong-Suo Zhang;Min Li;X. Su;Qing Zhang;Xinyan Shan
中科院分区：
文献类型：
--
作者：
Zhangkai Zhou;Xiao-niu Peng;Zhongjian Yang;Zong-Suo Zhang;Min Li;X. Su;Qing Zhang;Xinyan Shan
我们研究了金纳米棒阵列与非连续纳米颗粒薄膜耦合的光学响应。我们发现，作为金纳米颗粒膜被调整到结晶制度，纳米棒-膜的混合物被调谐到等离子体Fano共振，其特征在于由纳米棒阵列的离散等离子体模式与结晶膜的连续带的相干耦合。因此，大大增强了增透膜的光透射率。更引人注目的是，纳米棒阵列周围的电磁场变得更强，这反映在雪崩多光子发光的2个数量级增强上。这些发现可能有助于设计各种等离子体纳米器件。
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.