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Fabrication of Aluminium Nanostructure for Visible to Ultraviolet Plasmonics

Abstract : Aluminum (Al) is now widely regarded as one of the most promising metals for pushing the spectral limits of plasmonics towards the ultraviolet range. Additionally, Al is cheap, abundant, non-toxic, and compatible with the complementary metal-oxide-semiconductor technology. In this thesis, we investigate numerically and experimentally the influence of various key parameters on the optical properties of Al nanostructures. Firstly, we study the natural stability of Al nanoparticles, which show about 90-days stability when totally exposed to the ambient air. Secondly, we study the influence of rapid thermal annealing on the plasmonic properties of Al nanostructures. Due to the reduction of the number of grain boundaries inside the metal, an improvement of the plasmonic resonances quality factor is found with annealing at optimal conditions. Thirdly, we unveil the crucial effect of the surface roughness of Al lithographed nanostructures. The surface roughness is found to cause the disappearance of the substrate-induced quadrupolar mode and the weakening of the plasmonic dipolar mode. Finally, we investigate the effect of three kinds of uniform disorder (displacement disorder, size disorder, and rotation disorder) on the plasmonic resonances of Al nanoparticle arrays. The possibility to tune their plasmonic properties in the visible and near ultraviolet range by controlling the disorder is studied
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Submitted on : Monday, April 19, 2021 - 5:18:08 PM
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Feifei_Zhang_2018TROY0011.pdf
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  • HAL Id : tel-03202328, version 1

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Feifei Zhang. Fabrication of Aluminium Nanostructure for Visible to Ultraviolet Plasmonics. Micro and nanotechnologies/Microelectronics. Université de Technologie de Troyes, 2018. English. ⟨NNT : 2018TROY0011⟩. ⟨tel-03202328⟩

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