Acoustic phonon impact on the inter-Coulombic decay process in charged quantum dot pairs

Bande, Annika

doi:10.1080/00268976.2019.1574986

Cited by 11 publications

(16 citation statements)

References 111 publications

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“…The proof is, however, coming within reach not only for experimental reasons. Also the physics of ICD in 2d is shown to lead to a faster decay than in the case of QDs in a wire, making ICD more likely the dominant process of possibly competing radiative 9 or phononmediated 62 decay. The speeding of ICD in 2d has its foundation in the two distinct decay channels, that of the x-and of the z-resonance, which are both open when exciting with a non-polar laser or even upon decay of the pure x or z-polarized due to Coulomb coupling of the two dimensions.…”

Section: Discussionmentioning

confidence: 99%

Inter-Coulombic Decay in Laterally Arranged Quantum Dots Controlled by Polarized Lasers

2019

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The inter-Coulombic decay (ICD) process, where one electronically-excited species relaxes, while the neighboring one is concomitantly ionized, is recently discovered likewise in atomic, molecular, biological, and nanostructured systems. Any theoretical prediction of it relies strongly on an accurate treatment of the involved resonance and continuum states. Here, we describe laser-induced ICD in quantum dots with electron dynamics at a multiconfiguration time-dependent Hartree-Fock level for the first time for a two-dimensional continuum, which was possible by implementing an efficient Multigrid POTFIT representation of the Coulomb interaction, such that ICD control with laser polarization is within reach. Conclusively, ICD turns out to be much faster in laterally-arranged self-assembled or lithographic quantum dots connected to a twodimensional wetting-layer continuum than in previously investigated dots in nanowires.

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Section: Discussionmentioning

confidence: 99%

Inter-Coulombic Decay in Laterally Arranged Quantum Dots Controlled by Polarized Lasers

2019

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“…However, to achieve a high degree of efficiency of such devices, ICD must be the dominant process. In this context, electronphonon couplings are the main competing phenomena [16]. In general, the ICD efficiency decreases with increasing the distance between the donor and acceptor partners.…”

Section: Introductionmentioning

confidence: 99%

Interparticle coulombic decay in coupled quantum dots: Enhanced energy transfer via bridge assisted mechanisms

et al. 2020

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Interparticle Coulombic Decay (ICD) is an efficient energy transfer process between two weakly interacting systems. ICD was recently proposed as the underlying fundamental mechanism for technological purposes based on quantum dot nanostructures, such as wavelength-sensitive detectors. Via ICD, an excited donor quantum dot releases its excess energy by ionizing a neighbouring acceptor dot. Here, we demonstrate that the presence of a third (ICD inactive) quantum dot can serve as a bridge between the two dots, which is shown to result in an enhancement of the efficiency of the ICD-mediated energy transfer. Furthermore, our results show that this enhancement is found to be robust against the change of the characteristics of the bridge quantum dot and particularly the depth and size. On the other hand, its relative position with respect to the donor and acceptor dots is found to foster the ICD when it is located in between the two dots. Our findings provide new insights for the development of ICD-based nanostructure technologies and particularly for rational design of three coupled quantum dots.

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“…Even within this wide range, the ICD rate is orders of magnitude larger than the rate of radiative decay 162 and is comparable to the decay rates due to coupling to phonons. 473 , 474 Therefore, these calculations established the feasibility of the ICD process in quantum dots. Similar to the resonant ICD process in atomic clusters, the process in dots is initiated by resonant absorption of light.…”

Section: Systems and Applicationsmentioning

confidence: 75%

Interatomic and Intermolecular Coulombic Decay

et al. 2020

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Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay mechanism occurring in weakly bound matter. In an ICD process, energy released by electronic relaxation of an excited atom or molecule leads to ionization of a neighboring one via Coulombic electron interactions. ICD has been predicted theoretically in the mid nineties of the last century, and its existence has been confirmed experimentally approximately ten years later. Since then, a number of fundamental and applied aspects have been studied in this quickly growing field of research. This review provides an introduction to ICD and draws the connection to related energy transfer and ionization processes. The theoretical approaches for the description of ICD as well as the experimental techniques developed and employed for its investigation are described. The existing body of literature on experimental and theoretical studies of ICD processes in different atomic and molecular systems is reviewed.

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Acoustic phonon impact on the inter-Coulombic decay process in charged quantum dot pairs

Cited by 11 publications

References 111 publications

Inter-Coulombic Decay in Laterally Arranged Quantum Dots Controlled by Polarized Lasers

Inter-Coulombic Decay in Laterally Arranged Quantum Dots Controlled by Polarized Lasers

Interparticle coulombic decay in coupled quantum dots: Enhanced energy transfer via bridge assisted mechanisms

Interatomic and Intermolecular Coulombic Decay

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