A5049632386- Semiconductor Quantum Structures and Devices
- Quantum Dots Synthesis And Properties
- Quantum and electron transport phenomena
- Chalcogenide Semiconductor Thin Films
- GaN-based semiconductor devices and materials
- Nanowire Synthesis and Applications
- 2D Materials and Applications
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Semiconductor materials and interfaces
- Graphene research and applications
- Spectroscopy and Quantum Chemical Studies
- Silicon Nanostructures and Photoluminescence
- ZnO doping and properties
- Advanced Chemical Physics Studies
- Quantum Information and Cryptography
- Near-Field Optical Microscopy
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor Lasers and Optical Devices
- Ga2O3 and related materials
- Semiconductor materials and devices
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Quantum Mechanics and Non-Hermitian Physics
Mohammed V University
2015-2024
Université Mohammed VI Polytechnique
2022-2024
École Normale Supérieure de l'Enseignement Technique de Mohammedia
2013-2023
Thi Qar University
2023
École nationale supérieure d'arts et métiers
2023
University of Tarapacá
2023
Université de Lorraine
2016-2018
École Normale Supérieure
2001-2018
École Normale Supérieure d'Abidjan
2001-2018
Laboratoire de Chimie Organique
2017-2018
The features of the electron energy spectrum in eccentric two-dimensional GaAs-AlGaAs quantum rings circular shape are theoretically investigated taking into account effect externally applied magnetic and intense laser fields. Analytical expressions for laser-dressed confining potential this kind ring geometry reported first time. Finite element method is used to solve resulting single-particle effective mass partial differential equation. It shown that allowed level greatly influence by...
We study electron scattering in graphene quantum dots (GQDs) under the combined influence of a magnetic field, an energy gap, and circularly polarized laser irradiation. Using Floquet approach Dirac equation, we derive spectrum solutions. The coefficients are calculated explicitly by matching eigenspinors at GQD interfaces, revealing dependence on several physical parameters. In addition, compute efficiency, density distribution, lifetime quasi-bound states. Our numerical results show that...
The electronic states in GaAs-AlxGa1-xAs elliptically-shaped quantum rings are theoretically investigated through the numerical solution of effective mass band equation via finite element method. results obtained for different sizes and geometries, including possibility a number hill-shaped deformations that play role either connected or isolated dots (hills), depending on configuration chosen. ring transversal section is assumed to exhibit three geometrical symmetries - squared, triangular...
This study investigates the effect of quantum size and an external magnetic field on optoelectronic properties a cylindrical AlxGa1-xAs/GaAs-based core/shell nanowire. We used one-band effective mass model to describe Hamiltonian interacting electron-donor impurity system employed two numerical methods calculate ground state energies: variational finite element methods. With confinement barrier at interface between core shell, symmetry revealed proper transcendental equations, leading...
The line shape of the optical and magneto-optical absorption negatively charged excitons in three- two-dimensional (2D) semiconductors has been studied. coefficients have determined using envelope wave functions obtained by variational means. At zero field, exciton lines are disposed at low-energy side threshold frequency with a rapidly decreasing long tail. In case, maximum corresponds to frequency, while 3D this is shifted lower transition energies. magnetic field gives rise Landau...
In this work, using the compact density matrix approach, we study linear and nonlinear magneto-optical properties of monolayer molybdenum disulfide (MoS2) via an investigation absorption coefficients (MOACs) refractive index changes (RICs). The results are presented as functions photon energy external magnetic field. Our show that MOACs RICs appear a series peaks in inter-band transitions between Landau levels, while intra-band result only one peak. Because strong spin-orbit coupling, caused...
In this study, we have investigated the confined donor impurity in a hollow cylindrical-shell quantum dot. The charges are assumed to be completely interior of shell with rigid walls. Within framework effective-mass approximation and by using simple variational approach, computed binding energy as function sizes order study behavior electron-impurity attraction for very small thickness. Our results show that placed at center cylindrical core/shell dots depends strongly on size. increases...
The donor impurity-related electron states in GaAs cone-like quantum dots under the influence of an externally applied static electric field are theoretically investigated. Calculations performed within effective mass and parabolic band approximations, using variational procedure to include electron–impurity correlation effects. uncorrelated Schrödinger-like obtained quasi-analytical form entire correlated used calculate photoionisation cross section. Results for state energies section...
We have studied the parallel and perpendicular electric field effects on system of SiGe prolate oblate quantum dots numerically, taking into account wetting layer dot size effects. Using effective-mass approximation in two bands model, we computationally calculated extensive variation dipole matrix (DM) elements, bandgap non-linear optical properties, including absorption coefficients, refractive index changes, second harmonic generation third as a function field, dot. The redshift is...
In this theoretical investigation, we delve into the significant effects of donor impurity position within core/shell quantum dot structures: type I (CdTe/ZnS) and II (CdTe/CdS). The impurity’s precise location both core shell regions is explored to unveil its profound influence on electronic properties these nanostructures. Our study investigates diamagnetic susceptibility binding energy while considering presence an external magnetic field. Moreover, lattice mismatch-induced strain between...
The effect of a lateral electric field on donor impurity confined in thin quantum disk is studied theoretically the framework mass approximation and using Ritz variational approach. We show that binding energy depends several parameters: dot size, position impurity, strength, its orientation relative to axis containing impurity. When located at one edge oriented opposite direction, considerably reinforced due simultaneous additive effects coulombic potential electrostatic force. competition...