Design de réseaux apériodiques et des interactions électromagnétiques coopératives dans des structures plasmoniques : application à la conception d’absorbeurs pour le solaire concentré

Mathieu Langlais 1
1 Laboratoire Charles Fabry / Naphel
LCF - Laboratoire Charles Fabry
Abstract : The current energy situation requires the development of technologies that use renewable energy sources to reduce the dependence on fossil fuels and the impact of human activity on climate change. Among these technologies, thermodynamic solar power uses solar energy to heat an absorber, whose heat is then converted into electricity through a classical thermodynamic cycle. The improvement of the performances of this technology requires the design of absorbers able to operate strongly at high temperature. In this thesis, we explore two different ways for this purpose.The first is based on the design of multilayer structures optimized by a genetic algorithm.We will see that these structures lead to an efficiency higher than 80 %, very close to the fundamental limits, demonstrating so their strong potential for thermodynamic solar technology. The second way is based on the optimization of electromagnetic interactions inside plasmonic nanostructures composed of metal nanoparticles. These structures are the site of cooperative effects between nanoparticles that can exalt strongly losses inside the structure. These mechanisms are exploited to design absorbers based on binary networks made with nanoparticles of gold and silver dispersed in a transparent matrix.
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Mathieu Langlais. Design de réseaux apériodiques et des interactions électromagnétiques coopératives dans des structures plasmoniques : application à la conception d’absorbeurs pour le solaire concentré. Optique [physics.optics]. Institut d’Optique Graduate School, 2014. Français. ⟨NNT : 2014IOTA0018⟩. ⟨tel-01126990⟩

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