Yazar "Duque, Carlos A." seçeneğine göre listele

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    Effect of Intense Laser Field in Gaussian Quantum Well With Position-Dependent Effective Mass
    (Wiley-V C H Verlag Gmbh, 2019) Sari, Huseyin; Kasapoglu, Esin; Sakiroglu, Serpil; Sokmen, Ismail; Duque, Carlos A.
    In this paper, the effects of the intense laser field (ILF) and position dependent mass (PDM) on the electronic structure in a Gaussian quantum well are theoretically deduced by using the diagonalization method for obtaining energy levels and corresponding wave functions. We find that, in the case of narrow PDM distribution, the dependence of the energy levels on the effective length of the electron mass distribution becomes more apparent, and the evolution of the dressed mass with ILF is significant. Given this feature, it is more meaningful to take into consideration the PDM of the electron in the low dimensional semiconductor heterostructures under the ILF.
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    Parabolic-Gaussian Double Quantum Wells under a Nonresonant Intense Laser Field
    (Mdpi, 2023) Kasapoglu, Esin; Yucel, Melike Behiye; Duque, Carlos A.
    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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    Simultaneous effects of the position dependent mass and magnetic field on quantum well with the improved Tietz potential
    (Elsevier, 2024) Kasapoglu, Esin; Yucel, Melike Behiye; Duque, Carlos A.; Mora-Ramos, MiguelE.
    In this study, we explored the synergistic impact of position -dependent mass and magnetic field on the electronic and optical properties of quantum wells, featuring an enhanced Tietz potential confinement incorporating both standard Morse and improved Rosen-Morse potentials, as influenced by variations in the structural parameter. Calculations were conducted within the framework of effective mass and parabolic band approximations. The diagonalization method was employed, selecting a wave function basis of trigonometric orthonormal functions to determine the eigenvalues and eigenfunctions of the confined electron potential. Our findings reveal that alterations in the sizes and shapes of the quantum wells, magnetic field strength, geometric asymmetry, and confinement parameters lead to significant variations in electron energies, transition between electron states, and the absorption spectrum. These outcomes offer valuable insights for investigating the electronic and structural properties of materials and devising novel materials with tailored optical characteristics.