期刊
NANO LETTERS
卷 11, 期 1, 页码 49-55出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1026869
关键词
Plasmonic Fano resonance; plasmon hybrid; gold percolating film; gold nanorod array; enhanced transmission; enhanced photoluminescence
类别
资金
- NSFC [10874134]
- National Basic Research Program of China [2007CB935300, 2011CB922200]
- U.S. DOE (Division of Materials Sciences and Engineering, Office of Basic Energy Sciences)
- U.S. NSF [DMR-0906025]
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.
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