Polaronic mass and non-parabolicity effects on the photoionization cross section of an impurity in a double quantum dot

Arraoui, R.; Sali, A.; Ed-Dahmouny, A.; Jaouane, M.; Fakkahi, A.

doi:10.1016/j.spmi.2021.107049

Cited by 33 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within the framework of the dipole approximation under Fermi's golden rule, the analytical expression of photon energy-dependent shallow donor impurity-related PICS is given as [21,26]: is the fine structure constant, and x x / eff 0 is the ratio between the effective electric field at the level of the impurity and the average field considered as the unit as reported in [5].…”

Section: * *mentioning

confidence: 99%

“…PICS research has received a lot of attention in the previous few decades, notably in quantum dot (QD), quantum well wire (QWW), quantum ring (QR), and quantum well (QW) . For instance, Arraoui et al [5] have reported the polaronic and non-parabolicity impacts on the PICS in QD based on GaAs material. Also, the influences of the combined temperature and hydrostatic pressure are investigated recently by Wang et al [6] on the semiconductor materials under the magnetic and terahertz laser fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A theoretical study of the effects of electric field, hydrostatic pressure, and temperature on photoionization cross-section of a donor impurity in (Al, Ga)N/AlN double triangular quantum wells

et al. 2023

View full text Add to dashboard Cite

The aim of this research is to analyze the influence of various factors on the photo-ionization cross-section in (Al,Ga)N/AlN double triangular quantum wells. Using the finite difference method, the effects of the electric field, hydrostatic pressure, temperature, and Ga concentration were investigated within the effective mass and parabolic approximations. Our findings show that the photo-ionization cross-section (PICS) is highly dependent on all the variables under consideration. The optical spectra were blue-shifted with increasing electric field and pressure and red-shifted with increasing temperature and impurity displacement far from the center of the structure. Furthermore, it was found that changes in gallium content and impurity position can increase the PICS amplitude. A comparison of the obtained results with the existing literature as a limiting case of the reported problem is also provided, and excellent agreement is found.

show abstract

Section: * *mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A theoretical study of the effects of electric field, hydrostatic pressure, and temperature on photoionization cross-section of a donor impurity in (Al, Ga)N/AlN double triangular quantum wells

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Motivated by these studies, we investigate the electronic and optical properties of electrons confined in a GaAs quantum dot with a radial confinement described by the Woods-Saxon confining potential. The functional form of this potential was first proposed to describe and interpret interactive forces in the nuclear shell model [49]. Furthermore, this confining potential describes a smooth interface structure and gives an accurate description of aluminum diffusion from the AlGaAs barrier towards the GaAs quantum well.…”

Section: Introductionmentioning

confidence: 99%

GaAs Quantum Dot Confined with a Woods–Saxon Potential: Role of Structural Parameters on Binding Energy and Optical Absorption

Dakhlaoui,

Belhadj,

Elabidi

et al. 2023

Inorganics

View full text Add to dashboard Cite

We present the first detailed study of optical absorption coefficients (OACs) in a GaAs quantum dot confined with a Woods–Saxon potential containing a hydrogenic impurity at its center. We use a finite difference method to solve the Schrödinger equation within the framework of the effective mass approximation. First, we compute energy levels and probability densities for different parameters governing the confining potential. We then calculate dipole matrix elements and energy differences, E1p−E1s, and discuss their role with respect to the OACs. Our findings demonstrate the important role of these parameters in tuning the OAC to enable blue or red shifts and alter its amplitude. Our simulations provide a guided path to fabricating new optoelectronic devices by adjusting the confining potential shape.

show abstract

“…The quantum confinement that occurs the low dimensional system, quantum well [1,2], quantum wire [3] and QDs [4] exhibited new properties, especially the QD that has natural atomic-like discrete energy levels . Their physical properties can be controlled and adjusted by changing their size and composition, in addition to a variety of shapes which can be approximated as spherical [5,6], ring [7], cubic [8,9], cylindrical [10,11], pyramid [12] and ellipsoidal [13]. The QDs have drawn the attention by many researchers in both experimental and theoretical fields [14].…”

Section: Introductionmentioning

confidence: 99%

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Jaouane

El-Bakkari

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

In this study, we have scrutinized the influences of the temperature \(\left(T\right)\) and hydrostatic pressure \(\left(P\right)\) on the nonlinear and linear optical properties of a core/shell quantum dot (QD) system with Screened Modified Kratzer potential (SMKP). To realize this goal, we have examined the energy levels and their associated wave functions using the diagonalization method within the effective mass approximation. Analytical terms for absorption coefficients (ACs) and relative refractive index changes (RRICs) are exploited by means of the density matrix approach. The numerical outcomes are offered for typical InAs/GaAs core/shell QD system. The dependency of SMKP, dipole transition matrix element and electron energies of the ground (\(1s\)) and first excited state (\(1p\)) on the \(P\) and \(T\) that are varied over a range. Obtained numerical calculation results revealed that the \(P\) and \(T\) impacts the magnitude and position of the resonant peaks that characterize the ACs and RRICs.

show abstract

Polaronic mass and non-parabolicity effects on the photoionization cross section of an impurity in a double quantum dot

Cited by 33 publications

References 38 publications

A theoretical study of the effects of electric field, hydrostatic pressure, and temperature on photoionization cross-section of a donor impurity in (Al, Ga)N/AlN double triangular quantum wells

A theoretical study of the effects of electric field, hydrostatic pressure, and temperature on photoionization cross-section of a donor impurity in (Al, Ga)N/AlN double triangular quantum wells

GaAs Quantum Dot Confined with a Woods–Saxon Potential: Role of Structural Parameters on Binding Energy and Optical Absorption

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Contact Info

Product

Resources

About