Plasmonics: influence of the intermediate (or stick) layer on the efficiency of sensors

The efficiency of plasmon-resonance-based sensors can be greatly improved with an accurate design of the nano-structures that constitute them. In this work we focus our attention on the design of a particular kind of these nanometric structures that consists of planar multilayered systems. We show t...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2008-10, Vol.93 (1), p.177-181
Main Authors: Barchiesi, D., Macías, D., Belmar-Letellier, L., van Labeke, D., Lamy de la Chapelle, M., Toury, T., Kremer, E., Moreau, L., Grosges, T.
Format: Article
Language:English
Subjects:
Design engineering
Engineering
Engineering Sciences
Lasers
Nanocomposites
Nanomaterials
Nanostructure
Optical Devices
Optics
Optimization
Photonic
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Plasmonics
Quantum Optics
Sensors
Thin films
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Summary:The efficiency of plasmon-resonance-based sensors can be greatly improved with an accurate design of the nano-structures that constitute them. In this work we focus our attention on the design of a particular kind of these nanometric structures that consists of planar multilayered systems. We show the significant influence, on the plasmon resonance conditions, of the intermediate layer used to adhere a thin film of gold to a dielectric substrate. To illustrate this effect, we consider different intermediate layers to compute the optimal geometry that vanish the reflected energy. For this, we use the S-formulation and an evolutionary method for the electromagnetic and the optimization problems, respectively.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-008-3173-5