Strong field control of the interatomic Coulombic decay process in quantum dots

Haller, A.; Chiang, Ying‐Chih; Menger, Maximilian F. S. J.; Aziz, Emad F.; Bande, Annika

doi:10.1016/j.chemphys.2016.09.020

Cited by 12 publications

(39 citation statements)

References 73 publications

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“…Since the pioneering studies on diatomic systems, there have been a number of experimental and theoretical investigations into ICD that involve different materials, including clusters of atoms and molecules [218], quantum dots [219,220], and quantum wells [221]. Although ICD has considerable theoretical interest, there is evidence of its practical importance to biological chemistry; in particular, in the understanding of a DNA repair mechanism provided by the enzymes known as photolyases [222,223].…”

Section: Energy Transfer At Non-optical Frequenciesmentioning

confidence: 99%

Resonance Energy Transfer: From Fundamental Theory to Recent Applications

2019

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Resonance energy transfer (RET), the transport of electronic energy from one atom or molecule to another, has significant importance to a number of diverse areas of science. Since the pioneering experiments on RET by Cario and Franck in 1922, the theoretical understanding of the process has been continually refined. This review presents a historical account of the post-Förster outlook on RET, based on quantum electrodynamics, up to the present-day viewpoint. It is through this quantum framework that the short-range, R −6 distance dependence of Förster theory was unified with the long-range, radiative transfer governed by the inverse-square law. Crucial to the theoretical knowledge of RET is the electric dipole-electric dipole coupling tensor; we outline its mathematical derivation with a view to explaining some key physical concepts of RET. The higher order interactions that involve magnetic dipoles and electric quadrupoles are also discussed. To conclude, a survey is provided on the latest research, which includes transfer between nanomaterials, enhancement due to surface plasmons, possibilities outside the usual ultraviolet or visible range and RET within a cavity.

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Section: Energy Transfer At Non-optical Frequenciesmentioning

confidence: 99%

Resonance Energy Transfer: From Fundamental Theory to Recent Applications

2019

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“…with the frequency ω OP and the transition dipole moment µ among the two states [69,82]. If the equation was implemented, the choice of field strengths ε 0 would be a sensitive quantity for which no reference is known.…”

Section: Discussionmentioning

confidence: 99%

“…In a series of papers on pairs of singly-charged QDs, we particularly elucidated the electron dynamics of ICD [69,[80][81][82][83][84] with highly-accurate MCTDHF-like calculations [85,86] (multiconfiguration time-dependent Hartree-Fock). Motivation for this attempt has always been the curiosity in the time development of the electronic situation which cannot be addressed neither by non-Hermitian electronic structure theory for resonances [87][88][89][90] nor by nuclear dynamics of the cluster explosion after ICD [91][92][93] otherwise used in the prediction of ICD rates.…”

Section: Introductionmentioning

confidence: 99%

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

Bande

2019

Molecular Physics

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Recently, highly-accurate multi-configuration time-dependent Hartree (MCTDH) electron dynamics calculations demonstrated the efficient long-range energy transfer inter-Coulombic decay (ICD) process to happen in charged semiconductor quantum dot (QD) pairs. ICD is initiated by intraband photoexcitation of one of the QDs and leads to electron emission from the other within a duration of about 150 ps. On the same time scale electronically excited states are reported to relax due to the coupling of electrons to acoustic phonons. Likewise, phonons promote ionization. Here, the QDs' acoustic breathing mode is implemented in a frozen-phonon approach. A detailed comparison of the phonon effects on electron relaxation and emission as well as on the full ICD process is presented, which supports the previous empirical finding of ICD being the dominant decay channel in paired QDs. In addition the relative importance of phonon-phonon, phonon-electron, and electron-electron interaction is analysed.

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“…The parameter ranges may be taken from Table in real units of GaAs and in atomic units. Note that we conducted one large scan of

h_{E} \in [11.41, \dots, 23.29] nm

for one specific pair of default values

h_{A} = 18.04 nm

and

R = 86.62 nm

that were used in our other studies . For any other combination of h A and R , we diminished the interval to

h_{E} = [14.73, \dots, 19.34]

nm.…”

Section: Theorymentioning

confidence: 99%

“…The system is comprised of one designated photon‐absorbing QD (AQD) and one electron‐emitting QD (EQD). We conducted different studies on the interaction of the PQD with laser fields, as well as on the effects of geometrical changes on the ICD rate and electronic structure. For instance, we were able to reproduce the

R^{- 6}

behavior of the ICD rate as given in the asymptotic approximation for inter‐QD distances with vanishing orbital overlap …”

Section: Introductionmentioning

confidence: 99%

Interdependence of ICD rates in paired quantum dots on geometry

2017

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Using state-of-the-art antisymmetrized multiconfiguration time-dependent Hartree (MCTDH) electron dynamics calculations we study the interdependence of the intermolecular Coulombic decay (ICD) process on the geometric parameters of a doubly-charged paired quantum dot (PQD) model system in the framework of the effective mass approximation (EMA). We find that ICD displays a maximum rate for a certain geometry of the electron-emitting quantum dot, which is simultaneously dependent on both the distance between the quantum dots as well as the photon-absorbing quantum dot's geometry. The rate maximum is shown to be caused by the competing effects of polarization of electron density and Coulomb repulsion. The ICD rate-maximized PQD geometry in GaAs QDs yields a decay time of 102.39 ps. It is given by two vertically-aligned cylindrical QDs with radii of 14.42 nm separated by 86.62 nm. The photon absorbing QD then has a height of 46.59 nm and the electron emitting QD a height of 16.33 nm. © 2017 Wiley Periodicals, Inc.

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Strong field control of the interatomic Coulombic decay process in quantum dots

Cited by 12 publications

References 73 publications

Resonance Energy Transfer: From Fundamental Theory to Recent Applications

Resonance Energy Transfer: From Fundamental Theory to Recent Applications

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

Interdependence of ICD rates in paired quantum dots on geometry

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