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

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 14期

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

页数：5

共 32 条

[1] SCATTERING OF ELECTROMAGNETIC WAVES FROM 2 CONCENTRIC SPHERES [J].