Linear plasmon ruler with tunable measurement range and sensitivity

Liu, Shao-Ding; Cheng, Mu-Tian

doi:doi:10.1063/1.3463415

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Coverage dependence of magnetic domain structure and magnetic anisotropy in supported Fe nanoparticles on Al₂O₃/NiAl(100)

Studies of magnetic domain and magnetic anisotropy in collected nanoparticles are crucial for both understanding interparticle interaction and engineering in applications. In order to characterize the microscopic surface morphology and the nanoscale magnetic domain structure of Fe nanoparticles, a scanning tunneling microscope and a scanning electron microscope with polarization analysis (SEMPA) were used in our experiment. For the coverage of 9–13 monolayers (MLs) Fe deposited on Al2O3/NiAl(10...

Effect of surface hydrophilicity on the nanofretting behavior of Si(100) in atmosphere and vacuum

With an atomic force microscopy, the effect of surface hydrophilicity on the nanofretting behavior of Si(100) against SiO2 microsphere was investigated under vacuum and atmosphere conditions, respectively. The surface hydrophilicity revealed a strong effect on the motion behavior, adhesion force, friction force, and nanofretting damage of Si(100)/SiO2 pairs. The increase in the hydrophilicity of Si(100) surface could expand the stick regime of Si(100)/SiO2 pairs into a higher value of displacem...

The multiple localized surface plasmon resonances of nanorod dimers are theoretically investigated. The dark plasmon resonance of nanorod dimer aligned side-by-side is highly distance dependent. Based on this property, nanospheres are used to modify surface plasmon coupling between the two nanorods. The resonant wavelength shift increases approximately linearly with the increasing of nanospheres interparticle separations. This property makes such structure useful as plasmon ruler with homogeneous measurement sensitivity. The measurement range is increased to more than 100 nm, the resonant frequency is extended to the near-infrared region, and one can modify the structure size and nanorod aspect ratio freely to get the desired measurement range and sensitivity.

Article Outline

INTRODUCTION
PLASMON HYBRIDIZATION SCHEME
MULTIPLE LSPR MODES OF NR DIMERS
1. NR dimer aligned end-to-end
2. NR dimer aligned side-by-side
LINEAR PLASMON RULER
1. Structure with small physical size
2. Structure with large physical size
3. Structure simplification
4. Near field distribution
CONCLUSION

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KEYWORDS and PACS

Keywords

gold, nanostructured materials, surface plasmon resonance

PACS

73.20.Mf

Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

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http://dx.doi.org/10.1063/1.3463415

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0021-8979 (print)

1089-7550 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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