Experimental observation of sharp cavity plasmon resonances in dielectric-metal core-shell resonators
Experimental observation of sharp cavity plasmon resonances in dielectric-metal core-shell resonators
复制标题
介电金属核壳谐振器锐腔等离子体共振的实验观察
DOI：
10.1063/1.4933104
复制
发表时间：
2015-10-05
影响因子：
4
通讯作者：
Wang, Zhenlin
中科院分区：
文献类型：
--
作者：
Gu, Ping;Wan, Mingjie;Wang, Zhenlin
我们报道了通过在自支撑介质胶体上物理沉积金属来实现具有近乎完美的金属壳层的介质-金属核壳谐振器的实验结果，实验观察到了尖锐的电磁基腔等离激元共振，而增加金属壳层厚度增加了它们的Q因子，同时使它们的线宽变窄。特别是在偶极磁腔等离激元共振实验中，获得了高达100的高Q因子，相应的线宽减小到接近12 nm。模拟计算和Mic解析计算与实验结果吻合较好，并证明了这种三维谐振腔具有很强的光场限制特性。(C)2015 AIP出版有限责任公司。
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.