Excitonic trions in single and double quantum dots

Szafran, B.; Stébé, B.; Adamowski, J.; Bednarek, S.

doi:10.1103/physrevb.66.165331

Cited by 50 publications

(47 citation statements)

References 27 publications

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“…We found for both spherical [9] and cylindrical dots [8] that the negative trion is always redshifted with respect to the exciton line. The positive trion line becomes blueshifted with respect to the exciton for small dots.…”

Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 70%

“…The positive trion line becomes blueshifted with respect to the exciton for small dots. Shifts for the cylindrical dot of height 2Z and diameter 2R are plotted [8] in Fig. 10.…”

Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 99%

“…We studied the positions of the trion lines with respect to the exciton line in quantum dots in Refs. [9,8] using an extensive variational calculations with basis of correlated Gaussians and a generalization of Hamiltonian (1) to the three-particle complex. The shift of the negative trion is defined as…”

Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 99%

“…In our modeling [6][7][8][9][10][11][12] we used the following Hamiltonian for the electronhole pair:…”

Section: Theorymentioning

confidence: 99%

“…Such measurements for a single pair of dots separated of the entire ensemble have been realized only relatively recently [4,5]. In the present paper we review our work on interacting electrons and holes in vertically stacked InGaAs/GaAs self-assembled quantum dots [6][7][8][9][10][11][12] in context of the photoluminescence experiments performed in external electric field.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Quantum Dots - Spatial Correlations between Interacting Carriers

Szafran

2008

Acta Phys. Pol. A

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We review results of our modeling of excitons and excitonic trions confined in vertically stacked InGaAs/GaAs self-assembled quantum dots. Electrons and holes in double quantum dots are much more significantly correlated than in a single dot. For that reason our modeling was based on simple confinement potentials that allow for an exact diagonalization of the resulting two-and three-particle Hamiltonians with a precise account for the relative electron and hole localization along the stack. We studied the optical signatures of the coupling in context of the photoluminescence experiments performed in the external electric field. The calculations predicted prior to the experiment the mechanism of the exciton and negative trion dissociation by electron removal from the dot occupied by the hole. We discuss the competition between the tunnel and the electrostatic interdot couplings. Effects of the non-perfect alignment of the dots as well as stacks containing more than two dots are also discussed.

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Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 70%

“…The positive trion line becomes blueshifted with respect to the exciton for small dots. Shifts for the cylindrical dot of height 2Z and diameter 2R are plotted [8] in Fig. 10.…”

Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 99%

Section: Dissociation Of Negative Exciton Trion By the Electric Fieldmentioning

confidence: 99%

“…In our modeling [6][7][8][9][10][11][12] we used the following Hamiltonian for the electronhole pair:…”

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coupled Quantum Dots - Spatial Correlations between Interacting Carriers

Szafran

2008

Acta Phys. Pol. A

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Configuration interaction study of the single‐electron transport in the vertical gated quantum dot

Adamowski¹,

Bednarek

Szafran

2003

Physica Status Solidi (b)

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Dedicated to Professor Jozef T. Devreese on the occasion of his 65th birthday PACS 73.21.La A theoretical description is presented for a single-electron transport through a vertical gated quantum dot. Using the configuration interaction method we study the correlation effects in the gated quantum dots. We have found that the electron-electron correlation only slightly changes the single-electron tunnelling conditions in the absence of an external magnetic field, but has a pronounced influence on the magnetic-field induced phase transitions in few-electron systems confined in quantum dots.

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