1 Tuning gold nanorod-nanoparticle hybrids into plasmonic Fano resonance for enhanced lightening and transmission

Journal Article · Fri Jan 01 04:00:00 UTC 2010 · Physical Review Letters

OSTI ID:1010983

Zhou, Zhang-Kai ^[1]; Su, Xiong-Rui Su ^[1]; Peng, Xiao-Niu ^[1]; Wang, Qu-Quan ^[1]; Zhang, Qing ^[2]; Shan, Xin-Yan ^[2]; Zhang, Zhenyu ^[3]

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1. Wuhan University
2. Tsinghua University
3. ORNL

We investigate the optical response of a gold nanorod (NR) array coupled with a gold nanoparticle (NP) film. We show that, as the NP density is increased to the percolating regime, the NR-NP hybrids are tuned into plasmonic Fano resonance, characterized by the coherent coupling of the discrete plasmonic modes of the NR array with the continuous plasmonic modes of the NP film. As a consequence, the optical transmission of the NP film is substantially enhanced. Even more strikingly, the electromagnetic fields around the NR array become much stronger, as reflected by the two orders of magnitude enhancement in the avalanche photoluminescence. 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: 1010983
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Vol. 11; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FILMS
GOLD
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
PLASMONS
RESONANCE
TUNING