Twinned Fano interferences induced by hybridized plasmons in Au―Ag nanorod heterodimers
Twinned Fano interferences induced by hybridized plasmons in Au―Ag nanorod heterodimers
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DOI：
10.1063/1.3378689
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发表时间：
2010-04
影响因子：
4
通讯作者：
Zhongjian Yang;Z. Zhang;Wei Zhang;Zhong-Hua Hao;Ququan Wang
中科院分区：
文献类型：
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作者：
Zhongjian Yang;Z. Zhang;Wei Zhang;Zhong-Hua Hao;Ququan Wang
从理论上研究了金-银纳米棒异源二聚体中的等离子体干涉和杂化现象。在异源二聚体中，金纳米棒和银纳米棒的吸收截面上观察到双范诺谱，其范诺因子在反键共振附近具有相反的符号，这是由两个杂交的局部表面等离子体的破坏性干涉引起的。Fano因子的值和符号都可以通过调节杆长来调节，这在等离子体纳米器件的设计中具有应用价值。
We theoretically investigated the plasmon interferences and hybridization in the Au–Ag nanorod heterodimers. Twinned Fanolike profiles are observed in the absorption cross sections of the gold and silver nanorods in the heterodimers, the Fano factors of which have the opposite signs near the antibonding resonances, which are found to be induced by the destructive interferences of two hybridized local surface plasmons. Both the value and sign of the Fano factors could be tuned by adjusting rod-lengths, which could find the applications in the design of plasmonic nanodevices.