期刊
ACS NANO
卷 7, 期 3, 页码 2751-2757出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn4002006
关键词
adhesion layer; damping; surface-enhanced Raman scattering; near-field simulation; localized plasmon resonance; biosensors
类别
资金
- Swiss National Science Foundation (SNF)
Adhesion layers, required to stabilize metallic nanostngtures, dramatically deteriorate the performances of plasmonic sensors, by severely damping the plasmon modes. In this article, we show that these detrimental effects critically depend on the overlap of the electromagnetic near-field of the resonant plasmon mode with the adhesion layer and can be minimized by careful engineering of the latter. We study the dependence of the geometrical parameters such as layer thickness and shape on the near-field of localized plasmon resonances for traditional adhesion layers such as Cr, Ti, and h02. Our experiments and simulations reveal a strong dependence of the damping on the layer thickness, in agreement with the exponential decay of the piasmon near-field. We developed a method to minimize the damping by selective deposition of thin adhesion layers (<1 nm) In a manner that prevents the layer to overlap with the hotspots of the plasmonlc structure. Such a designed structure enables the use of standard Cr and Ti adhesion materials to fabricate robust plasmonic sensors without deteriorating their sensitivity.
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