Second-Order Resonant Polaron in a Self-Assembled Quantum Dot

Kaczmarkiewicz, Piotr; Machnikowski, Paweł

doi:10.12693/aphyspola.114.1139

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Its description is nontrivial since there are no direct matrix elements coupling those states. In our recent works [4,5], we have shown that such a resonance can be accurately modeled using the Fröhlich coupling Hamiltonian with standard (bulk) values of material parameters, contrary to earlier suggestions [6].…”

Section: Introductioncontrasting

confidence: 66%

Second‐order polaron resonances in self‐assembled quantum dots

Kaczmarkiewicz

Machnikowski

2011

Phys. Status Solidi (c)

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We theoretically study the optical properties of an InAs/GaAs quantum dot (QD) near the area of the second-order resonance between an electron confined in the QD and two longitudinal optical phonons. We present the absorption spectra of an inhomogeneously broadened QD ensemble and show that the minimal model needed for an accurate description of such a system needs to account for 3-phonon states. We study also the influence of the QD height to width ratio on the optical properties of the polaron system. The dependence of the width of the resonance and the position of the second-order resonant feature on the height to width ratio is presented.

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Section: Introductioncontrasting

confidence: 66%

Second‐order polaron resonances in self‐assembled quantum dots

Kaczmarkiewicz

Machnikowski

2011

Phys. Status Solidi (c)

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“…On the other hand, not accounting for 3-phonon states moves the resonance to higher magnetic fields and produces nonexistent polaron branches in the resonance area (See Ref. 21 for more details). We have also checked to what extent the numerical results depend on our choice of the l z /l 0 ratio.…”

Section: Magnetopolaron Resonancesmentioning

confidence: 99%

Section: Magnetopolaron Resonancesmentioning

confidence: 99%

Two-phonon polaron resonances in self-assembled quantum dots

Kaczmarkiewicz

Machnikowski

2010

Phys. Rev. B

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We study the second-order polaronic resonance between 2-LO-phonon states and p-shell electron states in a quantum dot. We show that the spectrum in the resonance area can be quantitatively reproduced by a theoretical model using only standard material constants, without any free parameters. We propose also a perturbative approach to the problem based on a quasi-degenerate perturbation theory. This method not only considerably reduces the numerical complexity without considerable loss of accuracy but also gives some insight into the structure and origin of the resonance spectrum.Comment: 11 page

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Second-Order Resonant Polaron in a Self-Assembled Quantum Dot

Abstract: We calculate numerically the spectrum of a polaron in a quantum dot in the region of resonance with two-phonon states. We show that the experimental data can be reproduced by a model that does not depend on any adjustable parameters.

Cited by 2 publications

References 7 publications

Second‐order polaron resonances in self‐assembled quantum dots

Second‐order polaron resonances in self‐assembled quantum dots

Two-phonon polaron resonances in self-assembled quantum dots

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