期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 107, 期 1, 页码 133-137出版社
SPRINGER
DOI: 10.1007/s00339-012-6757-1
关键词
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资金
- Joint Council of Agency for Science, Technology and Research (A*STAR) of Singapore [JCOAG03-FG04-2009]
- Science and Engineering Research Council (SERC) of A*STAR of Singapore [TSRP-1021520018]
We study the plasmonic properties of silver-silica-silver multilayer nanoshells using finite-difference time-domain methods. Silver is a weakly dissipating metal and is able to support higher order resonances compared to strongly dissipating metals like gold. We show that Fano resonances occur even in symmetric cases. Symmetry breaking via the introduction of core offset further enhances these Fano resonance peaks and leads to the appearance of higher order resonances. The optical properties of the multilayer nanoshells are explained using the plasmon hybridization theory and the results are compared to similar multilayer nanoshells with gold core and outer shell.
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