Experimental observation of sharp cavity plasmon resonances in dielectric-metal core-shell resonators

被引:24
作者
Gu, Ping [1 ,2 ]
Wan, Mingjie [1 ,2 ]
Shen, Qi [1 ,2 ]
He, Xiaodan [1 ,2 ]
Chen, Zhuo [1 ,2 ,3 ]
Zhan, Peng [1 ,2 ,3 ]
Wang, Zhenlin [1 ,2 ,3 ]
机构
[1] Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
关键词
SYMMETRY-BREAKING; FANO RESONANCES; NANOPARTICLES; NANOSTRUCTURES; DIPOLAR;
D O I
10.1063/1.4933104
中图分类号
O59 [应用物理学];
学科分类号
摘要
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.
引用
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页数:5
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