等离子体子
材料科学
时域有限差分法
纳米结构
表面等离子体子
拉曼散射
纳米颗粒
光电子学
电介质
纳米尺度
光学
联轴节(管道)
拉曼光谱
强度(物理)
纳米技术
复合材料
物理
作者
Zhen Li,Chonghui Li,Jing Yu,Zhaoxiang Li,Xiaofei Zhao,Aihua Liu,Shouzhen Jiang,Cheng Yang,Chao Zhang,Baoyuan Man
出处
期刊:Optics Express
[The Optical Society]
日期:2020-03-16
卷期号:28 (7): 9174-9174
被引量:26
摘要
The weak plasmonic coupling intensity in an aluminum (Al) nanostructure has limited potential applications in excellent low-cost surface-enhanced Raman scattering (SERS) substrates and light harvesting. In this report, we aim to elevate the plasmonic coupling intensity by fabricating an Al nanoparticle (NP)−film system. In the system, the Al NP are fabricated directly on different Al film layers, and the nanoscale-thick alumina interlayer obtained between neighboring Al films acts as natural dielectric gaps. Interestingly, as the number of Al film layers increase, the plasmonic couplings generated between the Al NP and Al film increase as well. It is demonstrated that the confined gap plasmon modes stimulated in the nanoscale-thick alumina region between the adjacent Al films contribute significantly to elevating the plasmonic coupling intensity. The finite-difference time-domain (FDTD) method is used to carry out the simulations and verifies this result.
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