Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4933104
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Funding
- State Key Program for Basic Research of China (SKPBRC) [2012CB921501, 2013CB632703]
- National Nature Science Foundation of China (NSFC) [11174137, 91221206, 11274160, 11321063, 51271092]
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We report on the experimental realization of dielectric-metal core-shell resonators with a nearly perfect metal shell layer by physically depositing metal onto the self-supporting dielectric colloids, Sharp electric and magnetic-based cavity plasmon resonances are experimentally observed, whereas increasing the metal shell thickness increases their Q-factors while narrowing their linewidths. In particular, a high Q-factor up to 100 with a correspondingly narrow linewidth down to similar to 12 nm is experimentally obtained at a dipolar magnetic cavity plasmon resonance. Simulations and analytical Mic calculations show excellent agreements with the experimental results and demonstrate strong optical field confinement of such three-dimensional resonators. (C) 2015 AIP Publishing LLC.
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