Optical characterization of laser-driven double Morse quantum wells

Kasapoğlu, E.; Şakiroğlu, S.; Sarı, H.; Sökmen, I.; Duque, C.A.

doi:10.1016/j.heliyon.2019.e02022

Cited by 16 publications

(2 citation statements)

References 31 publications

(34 reference statements)

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“…The disappearance of degeneracy in the energy levels depends on the respective potential parameters and the applied external fields. Since the nonlinear optical properties of semiconductor QWs mostly depend on the asymmetry of the confinement potential, when examining the optical properties of heterostructures such as quantum wells, wires, and dots, either their asymmetrical shapes are selected or an electric field is applied to symmetrical shapes [14][15][16][17][18][19][20][21][22]. Advanced high-power tuneable laser sources have motivated studies on the interaction of a high-frequency intense laser field (ILF) with carriers in semiconductors [23].…”

Section: Introductionmentioning

confidence: 99%

Parabolic–Gaussian Double Quantum Wells under a Nonresonant Intense Laser Field

2023

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In this paper, we investigate the electronic and optical properties of an electron in both symmetric and asymmetric double quantum wells that consist of a harmonic potential with an internal Gaussian barrier under a nonresonant intense laser field. The electronic structure was obtained by using the two-dimensional diagonalization method. To calculate the linear and nonlinear absorption, and refractive index coefficients, a combination of the standard density matrix formalism and the perturbation expansion method was used. The obtained results show that the electronic and thereby optical properties of the considered parabolic–Gaussian double quantum wells could be adjusted to obtain a suitable response to specific aims with parameter alterations such as well and barrier width, well depth, barrier height, and interwell coupling, in addition to the applied nonresonant intense laser field.

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Section: Introductionmentioning

confidence: 99%

Parabolic–Gaussian Double Quantum Wells under a Nonresonant Intense Laser Field

2023

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“…Thus, these potentials mentioned above have been extensively investigated under external fields such as electric, magnetic, and intense laser fields (ILFs). The effects of the ILF on the electronic structure in a Gaussian quantum well were investigated by Sari et al [ 19 ]; Kasapoglu et al investigated the effects of non-resonant high-frequency ILF on the electronic and optical properties of both the symmetric and asymmetric double Morse quantum wells, and quantum wells/quantum dots which have Razavy potential [ 20 , 21 ]. Furthermore, some of these potentials, which are called QES, have been studied under electric and magnetic fields [ 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of the Exciton Binding Energy and Exciton Absorption in Different Hyperbolic-Type Quantum Wells under Applied Electric, Magnetic, and Intense Laser Fields

Yücel

Sarı

Duque

et al. 2022

IJMS

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In this study, we investigated the exciton binding energy and interband transition between the electron and heavy-hole for the single and double quantum wells which have different hyperbolic-type potential functions subject to electric, magnetic, and non-resonant intense laser fields. The results obtained show that the geometric shapes of the structure and the applied external fields are very effective on the electronic and optical properties. In the absence of the external fields, the exciton binding energy is a decreasing function of increasing well sizes except for the strong confinement regime. Therefore, for all applied external fields, the increase in the well widths produces a red-shift at the absorption peak positions. The magnetic field causes an increase in the exciton binding energy and provides a blue-shift of the absorption peak positions corresponding to interband transitions. The effect of the electric field is quite pronounced in the weak confinement regime, it causes localization in opposite directions of the quantum wells of the electron and hole, thereby weakening the Coulomb interaction between them, causing a decrease in exciton binding energy, and a red-shift of the peak positions corresponding to the interband transitions. Generally, an intense laser field causes a decrease in the exciton binding energy and produces a red-shift of the peak positions corresponding to interband transitions.

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