# 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.

## 17 Citations

Lindblad theory of dynamical decoherence of quantum-dot excitons

- Physics
- 2013

We use the Bloch-Redfield-Wangsness theory to calculate the effects of acoustic phonons in coherent control experiments where quantum-dot excitons are driven by shaped laser pulses. This theory…

The role of phonons for exciton and biexciton generation in an optically driven quantum dot.

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2014

This review discusses the influence of phonons on three basically different optical excitation schemes that can be used for the preparation of exciton, biexciton and superposition states and compares the performance of the schemes for state preparation.

Dynamic vibronic coupling in InGaAs quantum dots [Invited]

- Physics
- 2016

The electron–phonon coupling in self-assembled InGaAs quantum dots is relatively weak at low light intensities, which means that the zero-phonon line in emission is strong compared to the phonon…

Phonon Effects on Population Inversion in Quantum Dots: Resonant, Detuned and Frequency-Swept Excitations

- Physics
- 2012

The effect of acoustic phonons on different light-induced excitations of a semiconductor quantum dot is investigated. Resonant excitation of the quantum dot leads to Rabi oscillations, which are…

Quantum dot-cavity systems

- Physics
- 2017

This thesis presents experiments carried out on a single InGaAs/GaAs quantum dot coupled with a photonic crystal cavity (H1). The single exciton qubit system is controlled by ultrafast optical…

Probing bath-induced entanglement in a qubit pair by measuring photon correlations

- Physics
- 2014

Self-assembled quantum dots are ideal structures in which to test theories of open quantum systems: Confined exciton states can be coherently manipulated and their decoherence properties are…

Influence of a phonon bath in a quantum dot cavity QED system: Dependence of the shape

- Physics
- 2014

We present a systematic analysis on the role of the quantum dot (QD) shape in the influence of the phonon bath on the dynamics of a QD cavity QED system. The spectral functions of the phonon bath in…

Decoherence control by quantum decoherence itself

- PhysicsScientific reports
- 2015

We propose a general approach of protecting a two-level system against decoherence via quantum engineering of non-classical multiple superpositions of coherent states in a non-Markovian reservoir.…

Realisation of a spin–photon interface using singlet–triplet qubits in self-assembled quantum dot molecules

- Physics
- 2017

We explore the prospects of using doubly charged, optically active, self-assembled quantum dot molecules in the (1,1) regime as a spin–photon interface. Using optical means, we investigate the…

Anticoherence in cavity QED systems: Influence from the associated baths beyond a Born approximation

- Physics
- 2016

The influence of the associated bath beyond a Born approximation (BA) is studied in a basic cavity QED system, i.e., the Rabi model coupled to a bath. It is shown that the application of a BA is…

## References

SHOWING 1-10 OF 66 REFERENCES

Damping of exciton Rabi rotations by acoustic phonons in optically excited InGaAs/GaAs quantum dots.

- PhysicsPhysical review letters
- 2010

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.

- PhysicsPhysical review letters
- 2010

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

- Physics
- 2004

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.

- PhysicsPhysical review letters
- 2003

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

- Physics
- 2005

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.

- PhysicsPhysical review letters
- 2004

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

- Physics
- 2010

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.

- PhysicsPhysical review letters
- 2004

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.

- PhysicsPhysical review letters
- 2007

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

- Physics
- 2005

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…