Informace o publikaci

GaAs quantum dots under quasiuniaxial stress: Experiment and theory

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YUAN Xueyong SILVA Saimon F. Covre da CSONTOSOVÁ Diana HUANG Huiying SCHIMPF Christian REINDL Marcus LU Junpeng NI Zhenhua RASTELLI Armando KLENOVSKÝ Petr

Rok publikování 2023
Druh Článek v odborném periodiku
Časopis / Zdroj Physical Review B
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1103/PhysRevB.107.235412
Doi http://dx.doi.org/10.1103/PhysRevB.107.235412
Klíčová slova Elasticity; Electronic structure; Excitons; Fermions; Lifetimes and widths; Luminescence; Nonlocality; Quantum cryptography; Stress
Popis The optical properties of excitons confined in initially unstrained GaAs/AlGaAs quantum dots are studied as a function of a variable quasiuniaxial stress. To allow the validation of state-of-the-art computational tools for describing the optical properties of nanostructures, we determine the quantum dot morphology and the in-plane components of externally induced strain tensor at the quantum dot positions. Based on these experimental parameters, we calculate the strain-dependent excitonic emission energy, degree of linear polarization, and fine-structure splitting using a combination of eight-band k·p formalism with multiparticle corrections using the configuration interaction method. The experimental observations are quantitatively well reproduced by our calculations and deviations are discussed.
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