Propriétés excitoniques des boîtes quantiques ultrafines

Propriétés excitoniques des boîtes quantiques ultrafines

Abdelaziz EL MOUSSAOUY / Mohammed Hbibi / Omar MOMMADI

64,56 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
ISBN:
9786202537674
64,56 €
IVA incluido
Disponible

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Ce livre présente une étude théorique des propriétés optiques et excitoniques d’un exciton confiné dans des boîtes quantiques (BQs) de forme discoïdale, en tenant compte des effets du confinement quantique, de la pression hydrostatique et de la température. L’analyse repose sur la méthode variationnelle, la théorie de la masse effective et la fonction enveloppe. Après une introduction aux notions fondamentales des semi-conducteurs et des nanostructures, l’ouvrage examine l’impact du confinement sur les niveaux d’énergie et les propriétés optiques. L’étude des propriétés excitoniques, linéaires et non linéaires, révèle qu’une réduction de la taille des BQs renforce le confinement, augmente l’énergie de liaison de l’exciton et provoque un décalage bleu des spectres d’absorption. L’effet combiné de la pression et de la température est également analysé : la pression accentue l’interaction électron-trou, tandis que la température et l’agrandissement des BQs induisent un décalage rouge. Deux relations analytiques simples permettent de décrire l’évolution de l’énergie de liaison en fonction de ces paramètres.

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