Plasmon resonance structure with metal nanoparticle layers

Details Plasmon resonance structure with metal nanoparticle layers Plasmon resonance structure with metal nanoparticle layers

2006-06-16

2009-02-03

Lauchman, L. G (Department: 2877)

Optics: measuring and testing

Of light reflection

C356S301000

Reexamination Certificate

active

07486400

ABSTRACT:
The electric-field enhancement effect by plasmon resonance is improved by favorably controlling the plasmon resonances in the thickness direction and in the direction orthogonal thereto. The plasmon resonance structure body comprises alternately stacked layers of metal nanoparticle layers and dielectric particle layers. The metal nanoparticle layers have a structure as such that the nano-sized fine particles of Au, Ag, Al, or the like, form metallic domains disposed at proper distance from each other along the direction orthogonal to the stacking direction of the layers. Used as the dielectric particle layer is, for instance, SiO2. The plasmon resonance in the thickness direction of the direction orthogonal thereto of the plasmon resonance structure body can be controlled by changing the particle diameter or the distance among the particles of the metal nanoparticles and the dielectric particles, or by changing the number of the stacked layers.

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Lin, Chii-Wan, et al., “Design and fabrication of an alternating dielectric multi-layer device for surface plasmon resonance sensor”, Mar. 2006, Sensors and Actuators B 113, pp. 169-176.

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