期刊
JOURNAL OF APPLIED PHYSICS
卷 108, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3475711
关键词
-
资金
- FUNCOAT, MICINN [CSD2008-00023]
- MAGPLAS MICINN [MAT2008-06765-C02-01/NAN]
- MICROSERES CAM [S2009/TIC-1476]
- M. Botin Foundation
- Gobierno Vasco (Spain)
- MICINN
In this paper, we analyze the magnetoplasmonic (MP) features and sensing capabilities of Au/Fe/Au trilayer structures, as transducers of the magneto-optic surface plasmon resonance (MOSPR) biosensor. This biosensor, which can surpass the sensitivity of the standard SPR sensor, is based on a MP modulation technique generated by the simultaneous stimulation of the surface plasmon polaritons (SPP) and the transversal magneto-optical Kerr effect (TMOKE). We study the magneto-optical activity of the trilayers as a function of the thickness and position of the Fe layer. We first demonstrate that this kind of structure allows modulating the SPP through an external magnetic field and moreover, induce a strong enhancement of the TMOKE effect. The modulation of the SPP is linearly proportional to the thickness of Fe layer and inversely proportional to the distance between the Fe layer and the external dielectric medium. Finally, we experimentally confirm a twofold increase in the MOSPR sensitivity with respect to the intensity-interrogated SPR biosensor in bulk refractive-index changes, keeping a similar chemical resistance and stability, unprecedented in other MP transducers, and biofunctionalization protocols. (c) 2010 American Institute of Physics. [doi:10.1063/1.3475711]
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