Electron-phonon dynamics in optically excited quantum dots: Exact solution for multiple ultrashort laser pulses

@article{Vagov2002ElectronphononDI,
  title={Electron-phonon dynamics in optically excited quantum dots: Exact solution for multiple ultrashort laser pulses},
  author={Alexei Vagov and Vollrath Martin Axt and Tilmann Kuhn},
  journal={Physical Review B},
  year={2002},
  volume={66},
  pages={165312}
}
A model of semiconductor quantum dots coupled to phonons and laser light, which is relevant in the limit of strong electronic confinement, is investigated. For an arbitrary sequence of excitations by ultrafast pulses, analytical solutions are obtained for all pertinent density-matrix elements. The results are nonperturbative with respect to the coupling to both phonons and laser light. The derivation depends neither on a particular choice of electronic wave functions nor on a particular wave… 

Ultrafast carrier and phonon dynamics in GaAs and GaN quantum dots

We analyse the electronic and phononic dynamics in GaAs and GaN quantum dot structures due to their interaction with acoustic phonons. We compare results for two specific quantum dot heterostructures

Impact of pure dephasing on the nonlinear optical response of single quantum dots and dot ensembles

The nonlinear optical response to ultrafast laser pulses of semiconductor quantum dots coupled to acoustic phonons is discussed on the basis of closed-form analytical results valid for dots in the

Quantum dynamics of optical phonons generated by optical excitation of a quantum dot

The study of the fundamental properties of phonons is crucial to understand their role in applications in quantum information science, where the active use of phonons is currently highly debated. A

Rabi oscillations of a quantum dot exciton coupled to acoustic phonons: coherence and population readout

While the advanced coherent control of qubits is now routinely carried out in low frequency (GHz) systems like single spins, it is far more challenging to achieve for two-level systems in the optical

Optical absorption in quantum dots: Coupling to longitudinal optical phonons treated exactly

Optical transitions in a semiconductor quantum dot are theoretically investigated, with emphasis on the coupling to longitudinal optical phonons, and including excitonic effects. When limiting to a

Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot

TLDR
It turns out that the total energy transferred to the phonons is directly linked in a monotonic way to the Rabi frequency.

Fluctuation properties of phonons generated by ultrafast optical excitation of a quantum dot

In this paper, the fluctuation properties of phonons after the optical excitation of a quantum dot with an ultrashort laser pulse are studied theoretically. When a single pulse with pulse area π

Ultrafast atomic-scale visualization of acoustic phonons generated by optically excited quantum dots

TLDR
Findings indicate that integration of a phononic emitter in opto-electronic devices based on quantum dots for controlled communication processes can be fundamentally feasible.

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

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

Analytical results for nonlinear optical signals from quantum dots coupled to phonons

The impact of pure dephasing processes on the optically induced nonlinear dynamics of quantum dots is analyzed. Concentrating on small dots pure dephasing can be studied analytically in the limit of
...

References

SHOWING 1-10 OF 43 REFERENCES

Coherent control of phonon quantum beats

Abstract The coherent control of excitons coupled to longitudinal optical phonons is analyzed in the quantum kinetic regime. Different models allowing for different levels of sophistication in the

Electron-phonon interaction in quantum dots: A solvable model

The relaxation of electrons in quantum dots via phonon emission is hindered by the discrete nature of the dot levels (``phonon bottleneck''). In order to clarify the issue theoretically we consider a

Theory of pure dephasing and the resulting absorption line shape in semiconductor quantum dots

The pure dephasing of the optical polarization and the corresponding line shape of absorption spectra in small quantum dots due to the interaction of the exciton both with optical and acoustic

Strong Electron-Phonon Coupling Regime in Quantum Dots: Evidence for Everlasting Resonant Polarons

Using far-infrared magnetospectroscopy in self-assembled InAs quantum dots, we have investigated the electronic transitions from the ground s levels to the excited p levels. The experiments consist

Interaction Induced Electron Self-Interference in a Semiconductor: The Phonon Staircase Effect

The exact quantum mechanics of a model semiconductor system of an electron with a discrete and equidistant energy spectrum interacting with a single phonon mode is presented. An electron initially

Acoustic Phonon Emission by Optically Excited Carriers in the InAs/GaAs Quantum Dot System

The phonons emitted by photoexcited carriers in self-organised InAs quantum dots in GaAs have been studied using a time-resolved bolometric detection technique. Measurements of the temporal,

Rabi oscillations of excitons in single quantum dots.

TLDR
The measurement extends the artificial atom model of quantum dot excitonic transitions into the strong-field limit, and makes possible full coherent optical control of the quantum state of single excitons using optical pi pulses.

Coupled quantum dots as quantum gates

We consider a quantum-gate mechanism based on electron spins in coupled semiconductor quantum dots. Such gates provide a general source of spin entanglement and can be used for quantum computers. We