| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mitiche, Sarra
CentraleSupélec
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2020Plasmonics of regular shape particles, a simple group theory approachcitations
- 2018Plasmonics, a Tool for the Engineering of the Near Optical Field at the Nanometer Scale : Optical Near Field Manipulation
- 2016Plasmonics of Au nano-objects by photoemission electron microscopy - A polarization study
Places of action
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thesis
Plasmonics, a Tool for the Engineering of the Near Optical Field at the Nanometer Scale : Optical Near Field Manipulation
Abstract
At nanometer scale, the metallic particles exhibit new optical properties related to the surface plasmon resonance phenomenon. A plasmon resonance is a collective and coherent oscillation of the conduction electrons at a metallic nanoparticle surface under an external electromagnetic field. The resonance wavelength and the spatial distribution of the associated electromagnetic field depend on the nanoparticle characteristics (size, shape and chemical nature), the surrounding dielectric medium and the illumination geometry.The excitation of surface plasmons generates local electromagnetic fields of high intensity located at specific points of the nanoparticle called "hot spots". The light is miniaturized and confined in sub-wavelength areas (<20 nm). The ability to produce and control hot spots holds great promise for a large range of applications from information technology to renewable energies and biomedicine. This thesis highlights the possibility of generating and manipulating hot spots in nanostructures throughout the particle geometry or/and the configuration and wavelength of the exciting light. To do this, the optical response of various metallic nano-objects of different geometries and sizes, taken individually: cube, prism ... or in groups: dimer, chain ... are studied by PhotoEmission Electron Microscopy (PEEM), a non-intrusive and high resolution (20 nm) mapping technique allowing a selective addressing of plasmons modes. In addition to this experimental investigation, the search for a specific optical near-field distribution is also carried out using group theory.We developed an original theoretical method allowing to predict in a few minutes the plasmonic response of a 2D or 3D particle, of finite or infinite symmetry, alone or in dimer, from the object and exciting field symmetries. In parallel, numerical simulations using the Boundary Element Method (BEM) have been carried out.