Temperature and hydrostatic pressure effects on single dopant states in hollow cylindrical core-shell quantum dot

El-Yadri, M.; Aghoutane, N.; Aouami, A. El; Feddi, E.; Dujardin, F.; Duque, C.A.

doi:10.1016/j.apsusc.2018.01.195

Cited by 43 publications

(9 citation statements)

References 23 publications

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“…Consider an electron with a confinement potential of V confined in the system. The Schrödinger equation of multidimensional confinement potential can be written as follows [24][25][26] À ℏ 2 2m Ã ðP, TÞ…”

Section: Theorymentioning

confidence: 99%

“…Consider an electron with a confinement potential of V confined in the system. The Schrödinger equation of multidimensional confinement potential can be written as follows [ 24–26 ]

$$- \frac{�?^{2}}{2 m^{\star} \left(\right. P , T \left.\right)} \left[\right.

…”

Section: Theorymentioning

confidence: 99%

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Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Wang

2023

Physica Status Solidi (b)

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The nonlinear optical properties of quantum dots under multidimensional confinement potential are investigated. In the framework of the effective mass approximation, the analytical formula of the optical absorption coefficient in the quantum dots is derived using the density matrix method and the iterative procedure, and the numerical results of typical Al0.3Ga0.7 As/GaAs material are calculated. Through calculation and numerical fitting, it is found that increasing temperature and the depth of limiting potential will give rise to the absorption peak to move to the high‐energy region commonly referred to as the blueshift, within a certain range of parameter variations. While reducing the range of limiting potential, quantum dot radius and the hydrostatic pressure can achieve the same effect. It is important to emphasize that variations in hydrostatic pressure and the depth of the limiting potential result in significant changes to the peak value of the optical absorption coefficient. The research results have a certain guiding significance for further study of the optical properties of quantum dots under multidimensional confinement potential and their application in practical production.

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Section: Theorymentioning

confidence: 99%

“…Consider an electron with a confinement potential of V confined in the system. The Schrödinger equation of multidimensional confinement potential can be written as follows [ 24–26 ]

$$- \frac{�?^{2}}{2 m^{\star} \left(\right. P , T \left.\right)} \left[\right.

…”

Section: Theorymentioning

confidence: 99%

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Wang

2023

Physica Status Solidi (b)

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“…While using the variational method, author in Ref. [40] performed a theoretical study of the ground state binding energy and the photoionization cross section of an impurity confined in a hollow cylindrical core-shell quantum dot under the influence of the hydrostatic pressure and temperature, which reveals how much the electronic and optical properties are sensitive to variation of the pressure and temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of an external electric field on the electronic and optical properties of a Cylindrical ZnS/ZnO multi-layer quantum dot with a parabolic potential

et al. 2023

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Within the framework of the effective mass approximation, a detailed investigation of the effects of an external (DC) electric field on the electronic and optical properties of a multi-layer cylindrical ZnS/ZnO quantum dot with fixed height and radius respectively at 10 nm and 5 nm, while modeling the ZnO wells using a parabolic potential. Numerical results were carried out using the Finite Difference Method (FDM), in order to compute the confinement energies, probability densities, expectation value for the potential describing a (DC) electric field for both the ground state and first excited state, and finishes by deducing the transition energy, transition dipole moment (TDM) and the absorption coefficient (AC) while taking into account multiple layer thickness configurations as we vary the electric field strength $F$. The results shows that varying the (DC) electric field strength does has an noticeable impact on the electronic and optical properties while all other inputs are kept unchanged.

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“…Therefore, applied external perturbations such as temperature (T), hydrostatic pressure (P) and incident optical intensity (I) are also used to change the physical properties of quantum dots (M. El-Yadri et al 2018;K. El-Bakkari et al 2018;M. El-Yadri et al 2018;L.…”

Section: -Introductionmentioning

confidence: 99%

Numerical modelling of electronic and optical properties for different sizes of CdSe/ZnS quantum dots under temperature and hydrostatic pressure effects

Brahim

Bouazra

Saïd

2023

Preprint

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In his paper, the electronic and optical properties of different sizes of CdSe/ZnS quantum dots (QDs) are theoretically investigated. The energy eigenvalues and wave functions dependence on QD dimension, temperature and pressure are calculated by using the combination of coordinate transformation and the finite difference method (FDM). The oscillator strength, transition lifetime, absorption coefficients (AC) and refractive index changes (RIC) are brought out for various values of dots sizes, temperature, hydrostatic pressure, and incident photon intensity. The obtained results indicated that the electronic and optical properties are strongly dependent on the temperature, hydrostatic pressure and on the size of the nanostructure. The oscillator strength decreased as the hydrostatic pressure increased, but increased as the temperature increased, the opposite behavior has observed for the transition lifetime. Moreover, the total of AC and RIC increase by decreasing the incident optical intensity. Linear, nonlinear, and total AC and RIC displays a red shift (blue shift) with increasing the hydrostatic pressure (temperature).

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Temperature and hydrostatic pressure effects on single dopant states in hollow cylindrical core-shell quantum dot

Cited by 43 publications

References 23 publications

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Effects of an external electric field on the electronic and optical properties of a Cylindrical ZnS/ZnO multi-layer quantum dot with a parabolic potential

Numerical modelling of electronic and optical properties for different sizes of CdSe/ZnS quantum dots under temperature and hydrostatic pressure effects

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Temperature and hydrostatic pressure effects on single dopant states in hollow cylindrical core-shell quantum dot

Cited by 43 publications

References 23 publications

Nonlinear Optical Properties of Al0.3Ga0.7As/GaAs Quantum Dots under Tunable Parameters

Nonlinear Optical Properties of Al0.3Ga0.7As/GaAs Quantum Dots under Tunable Parameters

Effects of an external electric field on the electronic and optical properties of a Cylindrical ZnS/ZnO multi-layer quantum dot with a parabolic potential

Numerical modelling of electronic and optical properties for different sizes of CdSe/ZnS quantum dots under temperature and hydrostatic pressure effects

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Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters