期刊
NANOTECHNOLOGY
卷 28, 期 10, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aa5b27
关键词
localized surface plasmon resonances (LSPRs); nanoparticle-on-mirror (NPOM); near-field enhancement; Fabry-Perot; surface enhanced Raman scattering (SERS)
资金
- National Basic Research Program of China (973 program) [2013CB934301]
- National Natural Science Foundation of China [51228101, 51572148]
- Chinese Ministry of Education [113007A]
- Fundamental Research Funds for the Central Universities [531107040995]
- Tsinghua University Initiative Scientific Research Program
We present a careful numerical study of nanoparticle (NP) faceting, highlighting the great influence of small morphological changes of NP-mirror cavities on near-field enhancement in the nanoparticle-on-mirror (NPOM) system. Using a 3D finite element method (FEM) plasmon mapping method, the active transverse cavity modes can be confirmed. For the dominant mode, we have found that, by increasing the facet width, the resonance can be tuned linearly to the red with little decrease of the peak near-field intensity. It is further demonstrated that by increasing the NP size, the near-field intensity can be strongly enhanced. Understanding of such extreme optics benefits significantly both the optimized design of potential plasmonic devices and the fundamental understanding of nano-optics. Collaborative experimental considerations are expected with the rapid development of nanotechnology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据