Impact of Phonons on Dephasing of Individual Excitons in Deterministic Quantum Dot Microlenses

Jakubczyk, Tomasz; Delmonte, Valentin; Fischbach, Sarah; Wigger, Daniel; Reiter, Doris E.; Mermillod, Q.; Schnauber, Peter; Kaganskiy, Arsenty; Schulze, Jan-Hindrik; Strittmatter, A.; Rodt, Sven; Langbein, Wolfgang Werner; Kuhn, Thomas; Reitzenstein, Stephan; Kasprzak, Jacek

doi:10.1021/acsphotonics.6b00707

Cited by 41 publications

(57 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The line broadening has a temperature-dependent shoulder, which cannot be exlained with a white noise model as outlined above. In contrast, the asymmetric lineshape is a direct consequence of the underlying non-Markovian dynamics between the QD and lattice vibrations [24,73,76,93,[121][122][123].…”

Section: A Non-lorentzian Lineshapes (Independent Boson Model)mentioning

confidence: 99%

Non-Markovian features in semiconductor quantum optics: quantifying the role of phonons in experiment and theory

Carmele

Reitzenstein

2019

Nanophotonics

Self Cite

View full text Add to dashboard Cite

We discuss phonon-induced non-Markovian and Markovian features in QD-based optics. We cover lineshapes in linear absorption experiments, phonon-induced incoherence in the Heitler regime, and memory correlations in two-photon coherences. To quantitatively and qualitatively understand the underlying physics, we present several theoretical models which model the non-Markovian properties of the electron-phonon interaction accurately in different regimes. Examples are the Heisenberg equation of motion approach, the polaron master equation, and Liouville-propagator techniques in the independent boson limit and beyond via the path-integral method. Phenomenological modeling overestimates typically the dephasing due to the finite memory kernel of phonons and we give instructive examples of phonon-mediated coherence such as phonon-dressed anticrossings in Mollow physics, robust quantum state preparation, cavity-feeding and the stabilization of the collapse and revival phenomenon in the strong coupling limit. * alex@itp.tu-berlin.de arXiv:1904.10905v1 [quant-ph] 24 Apr 2019 of exciting phenomena in these systems due to the ubiquitous non-Markovian electron-phonon and electron-electron dynamics. To name a few, quantum wires show phonon-enabled thermal conductivity [63] based on a universal quantum of thermal conductance [64]. Pronounced non-Markovian decoherence is demonstrated in localized nanotube excitons [32] and also phonon-assisted Anderson localization phenomena have been investigated [65]. In quantum wells, coherent acoustic oscillations are studied [66], and non-equilibrium cooling effects bottlenecked by non-Markovian phonon dynamics have been discussed [67]. Four-wave mixing techniques allow to study and characterize giant excitonic resonances [68,69], and via two-dimensional coherent spectroscopy techniques incoherent exciton-phonon Green's function can be probed and extracted in disordered quantum wells [70,71].Moreover, optical and electronic two-dimensional spectroscopy has drawn a lot interest recently, as non-Markovian, anomalous lineshapes and relaxation/scattering processes can be characterized and studied in depth. For example, the study of signatures of spatially correlated noise and non-secular effects [72] has been performed, the read-out of Rabi oscillations in QDs [73], exciton coherence at room temperature [74] investigated, systematic study of dephasing processes including quadratic electron-phonon coupling for elevated temperatures [75,76] and phonon sidebands in transition metal dichalcogenides have been demonstrated [77]. Despite the exciting results in higher-dimensional nanostructures and two-dimensional coherent spectroscopy, we focus in the following on a single material platform, semiconductor QDs. This allows us to discuss in detail instructive experimental examples in which the phonon interaction is the dominant source of decoherence and theoretical models which are capable to capture their specific details and can partially be treated even analytically. These models are, however, not li...

show abstract

Section: A Non-lorentzian Lineshapes (Independent Boson Model)mentioning

confidence: 99%

Non-Markovian features in semiconductor quantum optics: quantifying the role of phonons in experiment and theory

Carmele

Reitzenstein

2019

Nanophotonics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using the correlation expansion we calculate the dynamics of the phonons created during and immediately after the optical excitation [34,35]. The rapid generation of the exciton leads to the formation of a wave packet leaving the QD region [12,36]. For a spherical QD, the generated wave packet retains the spherical symmetry of the QD.…”

Section: Introductionmentioning

confidence: 99%

Phonon impact on optical control schemes of quantum dots: Role of quantum dot geometry and symmetry

2017

View full text Add to dashboard Cite

Phonons strongly influence the optical control of semiconductor quantum dots. When modeling the electron-phonon interaction in several theoretical approaches the quantum dot geometry is approximated by a spherical structure, though typical self-assembled quantum dots are strongly lens-shaped. By explicitly comparing simulations of a spherical and a lens-shaped dot using a wellestablished correlation expansion approach we show that indeed lens-shaped dots can be exactly mapped to a spherical geometry when studying the phonon influence on the electronic system. We also give a recipe to reproduce spectral densities from more involved dots by rather simple spherical models. On the other hand, breaking the spherical symmetry has a pronounced impact on the spatio-temporal properties of the phonon dynamics. As an example we show that for a lens-shaped quantum dot the phonon emission is strongly concentrated along the direction of the smallest axis of the dot which is important for the use of phonons for the communication between different dots.

show abstract

“…11) for τ 12 > 0 because of the coherence loss accompanying the emission of a phonon wave packet. 12 The dependence of this effect on the driving pulse areas will be discussed in Sec. V. Because the FWM signal is absent before the second laser pulse and the described drop within a few ps, the FWM amplitude has a maximum at delays τ 12 < 1 ps.…”

Section: A Two-level Systemmentioning

confidence: 99%

Exploring coherence of individual excitons in InAs quantum dots embedded in natural photonic defects: Influence of the excitation intensity

et al. 2017

View full text Add to dashboard Cite

The exact optical response of quantum few-level systems depends crucially on the exact choice of the incoming pulse areas. We use four-wave mixing (FWM) spectroscopy to infer the coherent response and dynamics of single InAs quantum dots (QDs) and study their pulse area dependence. By combining atomic force microscopy with FWM hyperspectral imaging, we show that the retrieved FWM signals originate from individual QDs enclosed in natural photonic defects. The optimized light-matter coupling in these defects allows us to perform our studies in a wide range of driving field amplitudes. When varying the pulse areas of the exciting laser pulses the so-called Rabi rotations can be resolved by the two-pulse FWM technique. We investigate these Rabi rotations within twoand three-level systems, both theoretically and experimentally, and explain their damping by the coupling to acoustic phonons. To highlight the importance of the pulse area influence, we show that the phonon-induced dephasing of QD excitons depends on the pulse intensity.

show abstract

Impact of Phonons on Dephasing of Individual Excitons in Deterministic Quantum Dot Microlenses

Cited by 41 publications

References 43 publications

Non-Markovian features in semiconductor quantum optics: quantifying the role of phonons in experiment and theory

Non-Markovian features in semiconductor quantum optics: quantifying the role of phonons in experiment and theory

Phonon impact on optical control schemes of quantum dots: Role of quantum dot geometry and symmetry

Exploring coherence of individual excitons in InAs quantum dots embedded in natural photonic defects: Influence of the excitation intensity

Contact Info

Product

Resources

About