Tuning Gold Nanorod-Nanoparticle Hybrids into Plasmonic Fano Resonance for Dramatically Enhanced Light Emission and Transmission

Journal Article · Thu Dec 31 23:00:00 EST 2009 · Nano Letters

OSTI ID:1081770

Zhou, Zhang-Kai ^[1]; Peng, Xiao-Niu ^[1]; Yang, Zhong-Jian ^[1]; Zhang, Zong-Suo ^[1]; Li, Min ^[1]; Su, Xiong-Rui Su ^[1]; Zhang, Qing ^[2]; Shan, Xin-Yan ^[2]; Wang, Qu-Quan ^[1]; Zhang, Zhenyu ^[3]

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1. Wuhan University
2. Tsinghua University
3. ORNL

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.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1081770
• Journal Information: Nano Letters, Journal Name: Nano Letters Journal Issue: 1 Vol. 11
• Country of Publication: United States
• Language: English