Electronic and optical properties of CdSe/ZnSe core/shell QDs within centered hydrogenic impurity and their tunability when subjected to an external electric field

Jbeli, A.; Zeiri, N.; Yahyaoui, N.; Baser, P.; Said, M.

doi:10.1016/j.physb.2023.415458

Cited by 6 publications

(1 citation statement)

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“…Structures constructed from AlGaAs/GaAs have been examined extensively among III-V [8][9][10] semiconductor materials because they can be integrated into innovative quantum cascade devices [11,12]. The nonlinear-optical process in intersubband transitions has a significant contribution from the quantum confinement effect, which can influence these characteristics by adjusting the structural parameters of the external fields [13][14][15][16][17]. The Total Optical Absorption Coefficient (TOAC) and Relative Refractive Index Changes (RRIC) are important parameters in the study of nonlinearoptical properties of materials.…”

Section: Introductionmentioning

confidence: 99%

Hydrostatic pressure and temperature effects on nonlinear optical properties in harmonic-Gaussian asymmetric double quantum wells

Sayrac,

Dakhlaoui,

Mora-Ramos

et al. 2024

Phys. Scr.

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The paper examines the linear and non-linear optical characteristics of an electron in harmonic Gaussian asymmetrical double quantum wells, taking into account thermodynamic variables such as temperature and hydrostatic pressure. Numerical calculations by considering the effective mass and parabolic band approximation are performed. The electron contained within an asymmetric double well generated by the sum of a parabolic and Gaussian potential has its eigenvalues and eigenfunctions determined using the diagonalization approach. For nonlinear optical coefficients, the density matrix expansion is used. Wavefunctions and energy levels vary as an effect of the applied fields. In harmonic Gaussian asymmetrical double quantum wells, the total optical absorption coefficient (TOAC), the relative refractive index changes (RRIC), and second harmonic generation (SHG) have all been theoretically investigated. The magnitude and position of the resonant peaks are significantly influenced by the temperature effects. With controllable coupling and externally applied hydrostatic pressure and temperature, the potential model presented in this study can be used to simulate and manipulate the optical and electronic properties of the asymmetric double-quantum heterostructures, such as double quantum dots and wells.

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