| 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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Eles, Balint
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2022Energy relaxation mechanisms in plasmonic nanocomposite materials under femtosecond laser excitation ; Mécanismes de relaxation énergétique dans les matériaux nanocomposites plasmoniques sous excitation laser femtoseconde
- 2022Mechanisms driving self-organization phenomena in random plasmonic metasurfaces under multipulse femtosecond laser exposure: a multitime scale studycitations
- 2022Development and applications of ultra-thin metallic films fabricated by Physical Vapor Depositioncitations
- 2022Color multiplexed images printed on plasmonic TiO2:Ag nanocomposite films
Places of action
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thesis
Energy relaxation mechanisms in plasmonic nanocomposite materials under femtosecond laser excitation ; Mécanismes de relaxation énergétique dans les matériaux nanocomposites plasmoniques sous excitation laser femtoseconde
Abstract
This thesis is devoted to the analysis of the response at different time scales of plasmonic nanocomposite materials subjected to femtosecond laser irradiation. The understanding of the energy relaxation pathways following laser excitation in such materials opens the way to efficient control of laser processes, and to a more efficient optimization of the laser micro-nanostructuring of plasmonic metasurfaces. The material studied throughout the work is a composite of silver nanoislands encapsulated between two layers of titanium dioxide, deposited on a glass substrate. The system presents a rich dynamics whose study, under reversible or irreversible excitation conditions, constitutes the main objective of this work.The thesis is divided into three main parts. The first describes the complex interplay of laser-induced mechanisms leading to shape transformations of the silver nanoislands and the formation of self-organized nanostructures. The results demonstrate that the irreversible transformations of nanoislands originate from the cumulative effect of tens of thousands of laser pulses, and highlight the appearance of different types of nanostructures depending on the temperature induced in the material. These nanostructures are characterized by a wide range of experimental techniques revealing the structural transformations and the corresponding optical response changes. The decisive role of the laser-induced temperature rise is analyzed in depth in this multi-pulse phenomenon using numerical methods. Moreover, the origin of self-organized nanoarrays is discussed by combining structural observations with electromagnetic calculations. The provided general description of the evolution of optically controlled physico-chemical mechanisms will allow to more quickly optimize the development of applications, in which an anisotropic optical response or an organized nanoscale arrangement of plasmonic metasurfaces is sought.The second part aims to characterize the ultrafast dynamics of shape transformations using ...