Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots

@article{Ramsay2011EffectOD,
  title={Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots},
  author={Andrew J. Ramsay and T. M. Godden and Stephen J. Boyle and Erik M. Gauger and Ahsan Nazir and Brendon W. Lovett and Achanta Venu Gopal and A. Mark Fox and M. S. Skolnick},
  journal={Journal of Applied Physics},
  year={2011},
  volume={109},
  pages={102415}
}
Recently, longitudinal acoustic phonons have been identified as the main source of the intensity damping observed in Rabi rotation measurements of the ground-state exciton of a single InAs/GaAs quantum dot. Here we report experiments of intensity damped Rabi rotations in the case of detuned laser pulses. The results have implications for the coherent optical control of both excitons and spins using detuned laser pulses. 

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References

SHOWING 1-10 OF 66 REFERENCES
Damping of exciton Rabi rotations by acoustic phonons in optically excited InGaAs/GaAs quantum dots.
We report experimental evidence identifying acoustic phonons as the principal source of the excitation-induced-dephasing (EID) responsible for the intensity damping of quantum dot excitonic Rabi
Phonon-induced Rabi-frequency renormalization of optically driven single InGaAs/GaAs quantum dots.
TLDR
It is demonstrated that the observed renormalization of the Rabi frequency is induced by fluctuations in the bath of longitudinal acoustic phonons, an effect that is a phonon analogy of the Lamb shift.
Resonant nature of phonon-induced damping of Rabi oscillations in quantum dots
Optically controlled coherent dynamics of charge (excitonic) degrees of freedom in a semiconductor quantum dot under the influence of lattice dynamics (phonons) is discussed theoretically. We show
Phonon-assisted damping of Rabi oscillations in semiconductor quantum dots.
TLDR
Rabi oscillations renormalized and a damping that depends on the input pulse strength, a behavior not known from exponential dephasing mechanisms are found.
The role of acoustic phonons for Rabi oscillations in semiconductor quantum dots
The damping of Rabi oscillations in quantum dots as well as the renormalization of the carrier-light coupling, due to the interaction with longitudinal acoustic phonons are studied as a function of
Quantum control of electron-phonon scatterings in artificial atoms.
TLDR
It is shown that appropriate tailoring of laser pulses allow complete control of the optical excitation despite the phonon dephasing, a finding in marked contrast to other environment couplings.
Heat pumping with optically driven excitons
We present a theoretical study showing that an optically driven excitonic two-level system in a solid-state environment can act as a heat pump by means of repeated phonon emission or absorption
Optical Stark effect in a quantum dot: ultrafast control of single exciton polarizations.
TLDR
The first experimental study of the optical Stark effect in single semiconductor quantum dots (QD) is reported, which can be understood as rotations of the QD polarization phase with negligible population change.
Nonmonotonic field dependence of damping and reappearance of Rabi oscillations in quantum dots.
TLDR
It is found that the phonon-induced damping of Rabi rotations is a nonmonotonic function of the laser field that is increasing at low fields and decreasing at high fields, which results in a reappearance of RBI rotations at high field.
Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control
We study the phonon-induced dephasing of the exciton state in a quantum dot excited by a sequence of ultra-short pulses. We show that the multiple-pulse control leads to a considerable improvement of
...
1
2
3
4
5
...