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<dc:title xml:lang="en">Coherent ultrafast spectroscopy of excitons in Van der Waals materials</dc:title>
<dcterms:alternative xml:lang="fr">Spectroscopie ultrarapide cohérente des excitons dans les matériaux de Van der Waals</dcterms:alternative>
<dc:subject xml:lang="fr">Spectroscopie ultrarapide</dc:subject>
<dc:subject xml:lang="fr">Microscopie à mélange à quatre ondes</dc:subject>
<dc:subject xml:lang="fr">Matériaux de Van der Waals</dc:subject>
<dc:subject xml:lang="fr">Dichalcogénure de métal de transition</dc:subject>
<dc:subject xml:lang="fr">Disulfure de rhénium</dc:subject>
<dc:subject xml:lang="fr">Hétérostructure</dc:subject>
<dc:subject xml:lang="fr">Exciton</dc:subject>
<dc:subject xml:lang="fr">Cohérence</dc:subject>
<dc:subject xml:lang="en">Ultrafast spectroscopy</dc:subject>
<dc:subject xml:lang="en">Four wave mixing microscopy</dc:subject>
<dc:subject xml:lang="en">Van der Waals materials</dc:subject>
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<dc:subject xml:lang="en">Heterostructure</dc:subject>
<dc:subject xml:lang="en">Exciton</dc:subject>
<dc:subject xml:lang="en">Coherence</dc:subject>
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<tef:elementdEntree autoriteExterne="027844595" autoriteSource="Sudoc">Forces de Van der Waals</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="171417267" autoriteSource="Sudoc">Mélange à quatre ondes</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="029718406" autoriteSource="Sudoc">Cohérence (physique nucléaire)</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Dans cette thèse, basée sur un développement original de microscopie de mélange à quatre ondesultrarapide, la première mesure directe de la dynamique de cohérence excitonique dans le disulfurede rhénium a été obtenue. Ces résultats ont démontré une robustesse unique de la cohérenceexcitonique par rapport à d'autres matériaux dichalcogénures de métaux de transition(TMD). Le potentiel de contrôle des propriétés intrinsèques des excitons dans les matériaux van der Waals (vdW) a été exploré dans des assemblages bidimensionnels innovants. En particulier, l'impact du graphène sur l'environnement excitonique d'une hétérostructure et sur les propriétés dynamiques de ces excitons a été étudié. Enfin, une avancée significative vers la compréhension et l'ingénierie des propriétés optiques des défauts émetteurs de photons uniques dans le nitrure de bore hexagonal (hBN) a été réalisée.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In this thesis, based on an original development of ultrafast four wave mixing microscopy, the firstdirect measurement of excitonic coherence dynamics in rhenium disulfide was obtained. Theseresults demonstrated a unique robustness of excitonic coherence compared to other Transition metal dichalcogenide (TMD) materials. The potential for controlling the intrinsic properties of excitons in van der Waals (vdW) materials was explored in innovative two-dimensional assemblies. In particular, the impact of graphene in the excitonic environment of a heterostructure on the dynamic properties of these excitons has been investigated. Finally, a significant step towards understanding and engineering the optical properties of single photon emitting defects in hBN has been achieved.</dcterms:abstract>
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