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

Dakhlaoui, Hassen; Belhadj, Walid; Elabidi, Haykel; Ungan, Fatih; Wong, Bryan M.

doi:10.3390/inorganics11100401

Cited by 2 publications

(1 citation statement)

References 51 publications

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“…In the literature, there are a lot of potential profiles to describe the interaction of an electron with the quantum dots. The used potential profiles have different shapes, including harmonic oscillator [23][24][25][26], anharmonic oscillator [27], Coulombic [28], parabolic and inverse square potential [29,30], Kratzer [31], and modified Kratzer [32,33], Morse [34,35], Pöschl-Teller [36][37][38][39][40], Rosen-Morse [41][42][43], Manning-Rosen [44], Gaussian [45], Woods-Saxon [46,47], Hulthen [48,49], the more general exponential cosine screened Coulomb (MGECSC) [50,51], Tietz [52], Hellmann [53], Mathieu [54,55], and inverse square root truncated and deformed exponential potentials [56].…”

Section: Introductionmentioning

confidence: 99%

Interaction of an electron and a uniformly charged spherical donor impurity

Mandal,

Karakoç,

Bayrak

2024

Phys. Scr.

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In this study, we propose an interaction potential between an electron and a uniformly charged spherical donor impurity in a quantum dot and numerically solve the Schrödinger equation using the finite difference method. We investigate the effects of the potential depth, donor radius, temperature, and hydrostatic pressure on the electronic and optical properties of an electron-donor impurity in a quantum dot, including absorption coefficients and the total change in the relative refractive index during the transition of an electron from the ground (1s) to excited (2p) states in the conduction band. Our findings indicate that an increase in donor radius or temperature leads to a red shift in the optical response, holding the parameters constant. Conversely, an increase in potential depth or hydrostatic pressure induces a blue shift in the optical response under the constant parameters.

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Section: Introductionmentioning

confidence: 99%

Interaction of an electron and a uniformly charged spherical donor impurity

Mandal,

Karakoç,

Bayrak

2024

Phys. Scr.

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Binding Energies and Optical Properties of Power-Exponential and Modified Gaussian Quantum Dots

Alauwaji,

Dakhlaoui,

Algraphy

et al. 2024

Molecules

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We examine the optical and electronic properties of a GaAs spherical quantum dot with a hydrogenic impurity in its center. We study two different confining potentials: (1) a modified Gaussian potential and (2) a power-exponential potential. Using the finite difference method, we solve the radial Schrodinger equation for the 1s and 1p energy levels and their probability densities and subsequently compute the optical absorption coefficient (OAC) for each confining potential using Fermi’s golden rule. We discuss the role of different physical quantities influencing the behavior of the OAC, such as the structural parameters of each potential, the dipole matrix elements, and their energy separation. Our results show that modification of the structural physical parameters of each potential can enable new optoelectronic devices that can leverage inter-sub-band optical transitions.

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

Cited by 2 publications

References 51 publications

Interaction of an electron and a uniformly charged spherical donor impurity

Interaction of an electron and a uniformly charged spherical donor impurity

Binding Energies and Optical Properties of Power-Exponential and Modified Gaussian Quantum Dots

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