Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single 
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 Quantum Dot

Henzler, P.; Traum, C.; Holtkemper, M.; Nabben, D.; Erbe, Manuela; Reiter, Doris E.; Kuhn, Thomas; Mahapatra, S.; Βrunner, Karl; Seletskiy, Denis V.; Leitenstorfer, Alfred

doi:10.1103/physrevlett.126.067402

Cited by 14 publications

(11 citation statements)

References 35 publications

(26 reference statements)

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“…Experimentally, an oscillatory behavior between absorptive/dispersive line shapes has been seen in a superposition of trion states in excellent agreement with theory. [ 40 ]…”

Section: Optical Signalsmentioning

confidence: 99%

“…In the time‐resolved dynamics we find an oscillation between absorptive and dispersive behavior, a typical signal for the occurrence of superposition states. [ 40 ] We expect that our theoretical predictions can be measured in heterodyne detection set‐ups used to measure four‐wave‐mixing signals of single QDs [ 41,42 ] or in differential transmission experiments available for single QDs. [ 40,43 ] Being able to provide analytical equations, we give an illustrative and insightful view on the corresponding dynamics and optical signals.…”

Section: Introductionmentioning

confidence: 99%

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Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

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Reiter

2021

Annalen der Physik

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Semiconductor quantum dots are solid state few‐level systems which can interact strongly with light. As such, they can be used as a single photon source or to perform solid‐state quantum‐optics experiments. A major difference to atoms is the interaction with the lattice vibrations, that is, the phonons, which strongly affect the optical signals from a quantum dot. In this paper, we calculate the time‐resolved pump‐probe signals from a continuously driven quantum dot accounting for detuned excitation and electron–phonon interaction. We provide analytical equations giving insight into the different phenomena observed in the spectra like an oscillation between absorptive and dispersive line shapes. For detuned excitation, the electron–phonon interaction can lead to phonon‐assisted occupation of the exciton, giving rise to a strong asymmetry in the dynamical behavior depending on the sign of the detuning. The time‐resolved spectra monitor this relaxation path, which helps understanding the effect of electron–phonon interaction in quantum dots.

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“…Experimentally, an oscillatory behavior between absorptive/dispersive line shapes has been seen in a superposition of trion states in excellent agreement with theory. [ 40 ]…”

Section: Optical Signalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Klaßen

Reiter

2021

Annalen der Physik

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“…The local field contribution (second term) is asymmetric and changes its sign from negative at 𝜔 < ω0 to positive at 𝜔 > ω0 . Such dispersive line shapes are known to appear in few-level systems that exhibit additional internal dynamics [28]. We find that all contributions from EID and local field vanish quickly for 𝜏 > 0.…”

Section: Theorymentioning

confidence: 63%

Local field effects in ultrafast light–matter interaction measured by pump-probe spectroscopy of monolayer MoSe₂

et al. 2021

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Using ultrafast resonant pump-probe spectroscopy in an unconventional experimental setup we investigate the spectral shape and dynamics of absorption features related to the A exciton in an hexagonal boron nitride (hBN)/MoSe2/hBN van der Waals heterostructure. While in a pure two-level system a pump-probe experiment measures the occupation or the polarization dynamics, depending on the time ordering of the pulse pair, in the transition metal dichalcogenide (TMD) system both quantities get thoroughly mixed by strong exciton–exciton interaction. We find that for short positive delays the spectral lines experience pronounced changes in their shape and energy and they relax to the original situation on a picosecond time scale. For negative delays, distinctive spectral oscillations appear indicating the first-time observation of perturbed free induction decay for a TMD system. The comparison between co-circular and cross-circular excitation schemes further allows us to investigate the rapid inter-valley scattering. By considering a three-level system as a minimal model including the local field effect, excitation-induced dephasing (EID), and scattering between the excited states we explain all phenomena observed in the experiment with excellent consistency. Our handy model can be even further reduced to two levels in the case of a co-circular excitation, for which we derive analytic expressions to describe the detected signals. This allows us to trace back the spectral shapes and shifts to the impact of local field effect and EID thus fully reproducing the complex behavior of the observed effects.

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“…Taking advantage of the shaper's capability to additionally introduce higher order spectral phase modulation, the trichromatic scheme can be further developed into a powerful tool for coherent control spectroscopy by using sequences of tailored pulses, thus generalizing the concept of 2D spectroscopy. In addition, the tunability of the shaper-generated polarization-controlled multicolor fields makes them attractive for applications in quantum information [222], quantum metrology [109,110,223] and ultrafast nanotechnology [79,178,214,224,225]. In all the experiments reported above, the tailored polarization profile was confined to the (x, y)-plane perpendicular to the propagation direction of the pulse.…”

Section: Discussionmentioning

confidence: 99%

Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

et al. 2021

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In this review, we report on recent progress in the generation and application of multichromatic polarization-tailored pulse sequences for the coherent control of multiphoton ionization (MPI) dynamics and present unpublished experimental results that complement our previous findings. Specifically, we utilize single-color, bichromatic, and trichromatic polarization-controlled pulse sequences generated by spectral amplitude, phase and polarization modulation of a carrier-envelope phase (CEP)-stable white light supercontinuum for MPI. The analysis of the number of ionization pathways and the number of distinct final free electron states shows that both increase significantly, but scale differently with the number of absorbed photons and the number of pulses in the sequence. In our experiments, ultrafast polarization shaping is combined with high-resolution photoelectron tomography to generate, control, and reconstruct three-dimensional photoelectron momentum distributions from atomic and molecular MPI. We discuss the use of polarization-controlled single-color and bichromatic pulse sequences in perturbative and non-perturbative coherent control of coupled electron-nuclear dynamics in molecules, atomic spin-orbit wave packet dynamics and the directional photoemission from atoms and chiral molecules. We compare the coherent control of CEP-insensitive intraband multipath interference in the MPI with a fixed number of photons with CEP-sensitive interband multipath interference in the ionization with a different number of photons. The generation and control of free electron vortices with even-numbered rotational symmetry by MPI with single-color pulse sequences is contrasted with the bichromatic control of CEP-sensitive electron vortices with odd-numbered rotational symmetry. To illustrate the potential of multichromatic pulse sequences for coherent control, we present a trichromatic scheme for shaper-based quantum state holography.

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Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot

Cited by 14 publications

References 35 publications

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Local field effects in ultrafast light–matter interaction measured by pump-probe spectroscopy of monolayer MoSe₂

Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

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Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot

Cited by 14 publications

References 35 publications

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Local field effects in ultrafast light–matter interaction measured by pump-probe spectroscopy of monolayer MoSe2

Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

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Product

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Local field effects in ultrafast light–matter interaction measured by pump-probe spectroscopy of monolayer MoSe₂