Self-assembled quantum dots

This page gathers publications on self-assembled semiconductor quantum dots, with emphasis on strain, band offsets, excitonic spectra, spin-related properties, and atomistic many-body modeling.

Dark-bright excitons mixing in alloyed InGaAs self-assembled quantum dots

Phys. Rev. B 103, 155418 (2021)

This work shows that atomic-scale alloy randomness alone can activate and reshape dark-exciton optical signatures in nominally symmetric self-assembled quantum dots. It links dark-exciton visibility directly to microscopic alloy configuration.

Keywords: self-assembled quantum dots

Main result: alloy randomness can strongly enhance and modify dark–bright exciton mixing without requiring deliberate faceting or elongation. Dark-exciton properties in alloyed dots are therefore intrinsically sample-specific.

PDF · DOI

Fine structure of dark and bright excitons in vertical electric fields: Atomistic theory of alloyed self-assembled InGaAs quantum dots

Phys. Rev. B 102, 245423 (2020)

This work analyzes excitonic fine structure and related optical anisotropies with atomistic many-body theory. It focuses on how realistic geometry, composition, and symmetry breaking determine the low-energy excitonic manifold.

Keywords: self-assembled quantum dots, fine-structure splitting

Main result: fine details of excitonic splitting and polarization are controlled by atomistic symmetry, realistic shape, and material inhomogeneity. Simplified continuum expectations are often insufficient at the µeV scale.

PDF · DOI

Deterministic Writing and Control of the Dark Exciton Spin Using Single Short Optical Pulses

Phys. Rev. X 5, 011009 (2015)

This work analyzes excitonic fine structure and related optical anisotropies with atomistic many-body theory. It focuses on how realistic geometry, composition, and symmetry breaking determine the low-energy excitonic manifold.

Keywords: dark exciton

Main result: fine details of excitonic splitting and polarization are controlled by atomistic symmetry, realistic shape, and material inhomogeneity. Simplified continuum expectations are often insufficient at the µeV scale.

PDF · DOI

Deterministic coherent writing of a long-lived semiconductor spin qubit using one ultrafast optical pulse

Phys. Rev. B 92, 201201(R) (2015)

This publication contributes to atomistic theory of semiconductor nanostructures and their electronic or optical properties. It emphasizes realistic material, structural, or many-body effects beyond simplified textbook models.

Keywords: atomistic theory, quantum dots

Main result: realistic atomistic modeling is necessary to capture key electronic or optical features of these nanostructures.

PDF · DOI

Excitonic complexes in natural InAs/GaAs quantum dots

Phys. Rev. B 91, 085303 (2015)

This publication contributes to atomistic theory of semiconductor nanostructures and their electronic or optical properties. It emphasizes realistic material, structural, or many-body effects beyond simplified textbook models.

Keywords: atomistic theory, quantum dots

Main result: realistic atomistic modeling is necessary to capture key electronic or optical features of these nanostructures.

PDF · DOI

Valence band offset, strain and shape effects on confined states in self-assembled InAs/InP and InAs/GaAs quantum dots

Valence band offset, strain and shape effects on confined states in self-assembled InAs/InP and InAs/GaAs quantum dots (2013)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: InAs/InP, self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI

Including strain in atomistic tight-binding Hamiltonians: An application to self-assembled InAs/GaAs and InAs/InP quantum dots

Phys. Rev. B 86, 115424 (2012)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: InAs/InP, self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI

Ab initio calculation of band edges modified by (001) biaxial strain in group IIIA–VA and group IIB–VIA semiconductors: Application to quasiparticle energy levels of strained InAs/InP quantum dot

J. Appl. Phys. 107, 104315 (2010)

This publication contributes to atomistic theory of semiconductor nanostructures and their electronic or optical properties. It emphasizes realistic material, structural, or many-body effects beyond simplified textbook models.

Keywords: InAs/InP

Main result: realistic atomistic modeling is necessary to capture key electronic or optical features of these nanostructures.

PDF · DOI

Atomistic tight-binding theory of multiexciton complexes in a self-assembled InAs quantum dot

Phys. Rev. B 81, 085301 (2010)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI

Multiexciton complexes in InAs self-assembled quantum dots

J. Appl. Phys. 105, 122406 (2009)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI

Strain effects on the electronic structure of strongly coupled self-assembled InAs/GaAs quantum dots: Tight-binding approach

Phys. Rev. B 74, 195339 (2006)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI

Strain and Spin-Orbit Effects in Self-Assembled Quantum Dots

Acta Phys. Pol. A 108, 929 (2005)

This work analyzes self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.

Keywords: self-assembled quantum dots

Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.

PDF · DOI