Binding energies and optical absorption of donor impurities in spherical quantum dot under applied magnetic field

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

doi:10.1016/j.physe.2020.114011

Cited by 63 publications

(14 citation statements)

References 39 publications

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“…Estimates of oscillator strength confirm that excited-state transitions are comparable to or weaker than the first transition, as expected from theory 56 . There are more than a few papers investigating the transition strengths of quantum dots [57][58][59][60][61] .…”

Section: Introductionmentioning

confidence: 99%

The contribution of edge number on the optical properties in ZnO pyramidal quantum dots

Mantashyan

2023

Quantum Optics and Photon Counting 2023

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Considerable advances in the growth process of quantum dots with non-trivial geometries have been obtained. These advances lead to countless applications in quantum optics, quantum information, and biophysics. However, the theoretical investigation of these objects is complex and analytically impossible in most cases. The investigation of pyramidal or conical quantum dots with a comparable height-to-base ratio is one of those problems. That is why the numerical finite element method in the framework of the envelope function approximation has been used to obtain the eigenvalues and eigenfunctions for ZnO pyramidal and conical quantum dots. The mesh domains required for the finite element method calculation were pyramidal domains with bases ranging from an equilateral triangle to an equilateral decagon. Cones were used for the approximation of the mesh objects for pyramidal quantum dots with a larger number of edges. Different head radius to height ratios (½, 1, 2, 3, 4) were considered. The optical transition energies were shown to decrease with the increase in the number of faces. The optical transition strengths were shown to exhibit the opposite behavior. The interband absorption curves generally exhibit a redshift with the increase in the number of edges.

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Section: Introductionmentioning

confidence: 99%

The contribution of edge number on the optical properties in ZnO pyramidal quantum dots

Mantashyan

2023

Quantum Optics and Photon Counting 2023

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“…In theoretical studies, it is common to use spherical shaped QDs, and many researchers have focused on the optical properties of this type of structure [3,6,[14][15][16]. Thanks to the rapid development of material growth techniques such as molecular beam epitaxy, metalorganic chemical vapor deposition and electron lithography and the advancement of chemical production processes, various dimensional new generation quantum nanostructures that allow electrons to be confined in these nanostructures have been produced, one of which is the coated spherical QDs called core/shell/shell QDs (CSSQDs) [17,18].…”

Section: Introductionmentioning

confidence: 99%

Effect of size modulation and donor position on intersubbands refractive index changes of a donor within a spherical core/shell/shell semiconductor quantum dot

Al¹

2021

Cumhuriyet Science Journal

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In the current study, linear, nonlinear and total relative refractive index changes of a single shallow hydrogenic donor atom confined in semiconductor core/shell/shell quantum dot heterostructure are investigated in detail by compact density matrix formalism. For this purpose, the energy eigenvalues and the corresponding wave functions are calculated by diagonalization method in the effective mass approximation. Then, intersubband 1 → 1 and 1 → 1 donor transition energies are calculated. In the study, the effects of core/shell sizes, donor position and depth of confinement potential are analyzed. The numerical results show that the linear and nonlinear refractive index changes undergo significant changes.

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“…In theoretical studies on QDs, it is usual to get a spherical shape and many works have focused on the optical properties of this type of structure [3,6,[18][19][20]. Thanks to the rapid development of crystal magnification procedures such as molecular beam epitaxy, metal organic chemical vapor deposition and electron lithography, and the advancement of chemical production processes, various dimensional new generation quantum nanostructures have been produced and one of which is core/shell/shell QD (CSSQD) [21,22].…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field, size and donor position on the absorption coefficients related a donor within the core/shell/shell quantum dot

2021

Opt Quant Electron

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Binding energies and optical absorption of donor impurities in spherical quantum dot under applied magnetic field

Cited by 63 publications

References 39 publications

The contribution of edge number on the optical properties in ZnO pyramidal quantum dots

The contribution of edge number on the optical properties in ZnO pyramidal quantum dots

Effect of size modulation and donor position on intersubbands refractive index changes of a donor within a spherical core/shell/shell semiconductor quantum dot

Effect of magnetic field, size and donor position on the absorption coefficients related a donor within the core/shell/shell quantum dot

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