Quantum Dots

Jacak, Lucjan; Wójs, Arkadiusz; Hawrylak, Paweł

doi:10.1007/978-3-642-72002-4

Cited by 989 publications

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“…In the last several years, there has been a considerable interest in quasi-zero dimensional self-assembled quantum dots (QDs), formed through the Stranki-Krastanow growth mode by deposition a material on the substrate with different lattice parameter [1]. This interest is related to potential technological application of QDs in optoelectronic devices [1][2], as well as to their character of novel quantum systems in which new physics and analogies with atomic clusters, atoms, molecules, may be found. The QDs shapes are not well known yet, nevertheless, structural studies suggest that commonly the quantum dots look like lenses, pyramids or disks [3].…”

Section: Introductionmentioning

confidence: 99%

Two electrons in vertically coupled one-dimensional rings

Marín¹,

García²,

Mikhailov³

2006

Braz. J. Phys.

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A problem of two electrons spatially separated in vertically coupled one-dimensional rings is solved exactly by using the numerical trigonometric sweep method. The change of the level-ordering and the crossover of the curves of the energy levels as a functions of the rings radii, the separation between rings and the magnetic field, applied along the axis, are found and discussed. As the distance between rings tends to zero our results are in an excellent agreement with those obtained previously for the single two-electron one-dimensional ring.

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Section: Introductionmentioning

confidence: 99%

Two electrons in vertically coupled one-dimensional rings

Marín¹,

García²,

Mikhailov³

2006

Braz. J. Phys.

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“…In QDs the electronic motion is confined in all three directions on a nanometer scale [1,26,27]. Therefore, the corresponding electronic spectra possess a discrete part similar to what is found for atoms.…”

Section: Quantum Dot Modelmentioning

confidence: 96%

The role of phonons for exciton and biexciton generation in an optically driven quantum dot

Reiter

Kuhn

Glässl

et al. 2014

J. Phys.: Condens. Matter

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Abstract. For many applications of semiconductor quantum dots in quantum technology a well controlled state preparation of the quantum dot states is mandatory. Since quantum dots are embedded in the semiconductor matrix, the interaction with phonons plays often a major role in the preparation process. In this review, we discuss the influence of phonons on three basically different optical excitation schemes which can be used for the preparation of exciton, biexciton, and superposition states: a resonant excitation leading to Rabi rotations in the excitonic system, an excitation with chirped pulses exploiting the effect of adiabatic rapid passage, and an off-resonant excitation giving rise to a phononassisted state preparation. We give an overview over experimental and theoretical results showing the role of the phonons and compare the performance of the schemes for state preparation.

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“…[5][6][7][8][9][10] The magnetism of these structures is significantly different from that of bulk crystals because the weak magnetic confinement is supplemented by a strong spatial confinement. The latter has a profound effect on the energy structure, carrier-carrier interactions, band mixing and spin-orbit interactions, 3 which, in turn, influence the g factor value.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field implementation in multibandk⋅pHamiltonians of holes in semiconductor heterostructures

Planelles

Climente

2013

J. Phys.: Condens. Matter

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We propose an implementation of external homogeneous magnetic fields in k•p Hamiltonians for holes in heterostructures, in which we made use of the minimal coupling prior to introduce the envelope function approximation. Illustrative calculations for holes in InGaAs quantum dot molecules show that the proposed Hamiltonian outperforms standard Luttinger model [Physical Review 102, 1030(1956] describing the experimentally observed magnetic response. The present implementation culminates our previous proposal [Phys. Rev. B 82, 155307 (2010)].

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Quantum Dots

Cited by 989 publications

References 0 publications

Two electrons in vertically coupled one-dimensional rings

Two electrons in vertically coupled one-dimensional rings

The role of phonons for exciton and biexciton generation in an optically driven quantum dot

Magnetic field implementation in multibandk⋅pHamiltonians of holes in semiconductor heterostructures

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