Intense Laser Field Effect on the Photo-Ionization Cross-Section of the First Exciton Transition in a Core/Shell Quantum Dot Submitted to an Applied Electric Field
| Primer Autor |
Perez, Laura M.
|
| Co-autores |
Aghoutane, Noreddine
Laroze, David
Diaz, Pablo
El-Yadri, Mohamed
Feddi, E. L. Mustapha
|
| Título |
Intense Laser Field Effect on the Photo-Ionization Cross-Section of the First Exciton Transition in a Core/Shell Quantum Dot Submitted to an Applied Electric Field
|
| Editorial |
MDPI
|
| Revista |
COATINGS
|
| Lenguaje |
en
|
| Resumen |
In the current work, we study the intense laser pulse influences on the behaviors of the first excitonic transition in a core/shell quantum dot submitted to an electric field. Therefore, the exciton binding energy and the mean distance between the correlated electron-hole pair are discussed, considering the electric field and laser strength. Our calculations show that both external fields play significant repulsive effects. Through their effects, they oppose the attractive nature of the Coulomb potential between the correlated pair, which decreases the excitonic binding energy. We also analyze the dissociation process by determining the photo-ionization cross-section (PICS). Our findings show that the peaks of the PICS redshift when the shell thickness b-a increases. For a given core radius, the laser and electric field induce a shift toward the low-energy region for the PICS, this displacement is more pronounced for the laser case. Our study also compares simple quantum dots and core/shell quantum dots to show the effect of the inner radius on the obtained results. Our theoretical results can lead to promising applications of exciton-based devices controlled by sizes and external fields.
|
| Fecha Publicación |
2023
|
| Tipo de Recurso |
artículo original
|
| doi |
10.3390/coatings13061098
|
| Formato Recurso |
PDF
|
| Palabras Claves |
core/shell quantum dots
exciton
Intense laser field
electric field
photo-ionization cross-section
exciton binding energy
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| Ubicación del archivo | |
| Categoría OCDE |
Ciencia de Materiales
Física
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| Materias |
puntos cuánticos de núcleo/capa
excitón
Intenso campo láser
campo eléctrico
sección transversal de fotoionización
energía de enlace del excitón
|
| Identificador del recurso (Mandatado-único) |
artículo original
|
| Versión del recurso (Recomendado-único) |
versión publicada
|
| License |
CC BY 4.0
|
| Condición de la licencia (Recomendado-repetible) |
CC BY 4.0
|
| Derechos de acceso |
acceso abierto
|
| Access Rights |
acceso abierto
|
| Id de Web of Science |
WOS:001033333800001
|
| Tipo de ruta |
verde# dorado
|
| Categoría WOS |
Ciencia de Materiales
Física
|
| Referencia del Financiador (Mandatado si es aplicable-repetible) |
ANID SA77210040
ANID BASAL AFB180001
ANID-FONDECYT 1231020
ANID FONDECYT 1231020
|
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