Multiple surface lattice resonances of overlapping nanoparticle arrays with different lattice spacing

被引:2
|
作者
Zheng, Haiyan [1 ]
Bai, Yating [1 ]
Zhang, Qiang [1 ,2 ]
Yu, Ying [1 ,2 ]
Liu, Shaoding [1 ]
机构
[1] Taiyuan Univ Technol, Key Lab Adv Transducers & Intelligent Control Syst, Minist Educ, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Coll Elect Informat & Opt Engn, Taiyuan 030024, Peoples R China
基金
中国国家自然科学基金;
关键词
Optical lattices;
D O I
10.1364/OE.503748
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Multiple surface lattice resonances generated with nanoparticle arrays are promising to enhance light-matter interactions at different spectral positions simultaneously, and it is important to tailor these resonances to desired frequencies for practical applications such as multi-modal nanolasing. To this end, this study proposes to generate multiple surface lattice resonances using overlapping nanoparticle arrays with different lattice spacing. Both full-wave numerical simulations and analytical coupled dipole approximation calculations reveal that for the overlapping structures composed with two different gold nanosphere arrays, both surface lattice resonances for the element structures are effectively excited. Considering that the optical responses are governed by the dipole-dipole interactions between the nanoparticles, it is interesting to find that the multiple surface lattice resonances are almost invariant by adjusting the relative shifts between the two arrays, which can be useful to tailor the high-quality factor resonances to desired spectral positions. In addition, due to the same reason, it is also shown that the multiple surface lattice resonances can be further finely tuned by selectively removing specific nanoparticles in the array. We anticipate that the tolerance to generate multiple surface lattice resonances and the flexible tunability make the overlapping nanoparticle arrays useful to design high performance linear and nonlinear nanophotonic devices.
引用
收藏
页码:35937 / 35947
页数:11
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