Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)

Dynamical Model for Coherent Optical Control of a Single Confined Spin

Gabriela M. Slavcheva

Published Sep 1, 2007• 0 citations
Publisher

Abstract

We extend [1] our new dynamical model [2,3] for resonant coherent circularly polarized optical pulse interactions with charged semiconductor quantum dots (QDs) to include dissipation in the system through the spin relaxation dynamics. A generalized pseudospin master equation is derived for description of the optically-induced time evolution of spin coherences and spin populations in terms of the real state pseudospin (coherence) vector. The equation is solved self-consistently with the vector Maxwell equations for the optical wave propagation coupled via macroscopic medium polarization. Using the model we demonstrate numerically coherent readout of a single spin polarization state exploiting the high-intensity Rabi oscillations regime. We show that coherent spin-polarization control can be achieved by varying the excitation intensity through the pulse area which allows for differentiation between the time traces of the polarized photoluminescence, thus enabling high-fidelity schemes for single spin detection. Longest-lived spin coherence is achieved for odd multiples of π-excitations.

DOI
10.1109/nusod.2007.4349037

Related papers

Coherent optical manipulation of a single spin state in a charged quantum dot: theory and modelling

Gabriela M. Slavcheva

The optically-induced coherent spin dynamics in a charged quantum dot (QD) is studied theoretically using a new dynamical model for rigorous description of circularly polarized ultrashort optical pulse resonant interactions with the electron-trion system. Generalized pseudospin master equation is derived for description of the time evolution of spin coherences and spin populations in terms of the real state pseudospin (coherence) vector including dissipation in the system through spin relaxation processes. The equation is solved in the time domain self-consistently with the vector Maxwell equations for the optical wave propagation coupled to it via macroscopic medium polarization. Using the model the long-lived electron spin coherence left behind a single resonant ultrashort optical excitation of the electron-trion transition in a charged QD is simulated in the lowand high-intensity Rabi oscillations regime. Signatures of the polarized photoluminescence (PL) resulting from the numerical simulations, such as the appearance of a second echo pulse after the excitation and a characteristic PL trace shape, specific for initial spin-up orientation, are discussed for realization of high-fidelity schemes for coherent readout of a single spin polarization state.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Sep 26, 2007•1 citation

Dynamical model for coherent optical manipulation of a single spin state in a charged quantum dot

Gabriela M. Slavcheva

Abstract The optically‐induced coherent spin dynamics of a single spin confined in a charged quantum dot (QD) is theoretically studied employing coupled vector Maxwell‐pseudospin formalism. Generalized pseudospin master equation is derived for description of the time evolution of spin coherences and spin populations including spin population transfer and dissipation in the system through spin relaxation processes. The equation is solved in the time domain self‐consistently with the vector Maxwell equations for the optical wave propagation coupled to it via macroscopic medium polarisation. Using the model the long‐lived electron spin coherence left behind a single resonant ultrashort optical excitation of the electron‐trion transition in a charged QD is simulated in the low‐ and high‐intensity Rabi oscillations regime. Signatures of the polarised photoluminescence (PL), predicted by the model, such as the appearance of a second echo pulse after the excitation and characteristic PL trace shape, are discussed for realization of high‐fidelity schemes for coherent readout of a single spin polarisation state. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics•Oct 20, 2008•0 citations

All-optical quantum coherent control of electron spin in semiconductor quantum dots

Gabriela M. Slavcheva, Ortwin G. Hess

We develop and apply a new dynamical model for rigorous description of circularly (elliptically) polarized ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations for electromagnetic wave propagation coupled via macroscopic polarization to the coherent time‐evolution equations of a discrete N‐level system in terms of the real pseudospin (coherence) vector. We investigate theoretically the optically‐induced ultrafast resonant coherent spin dynamics in a singly charged semiconductor quantum dot. Onset of Rabi oscillations at sufficiently high excitation intensities is demonstrated numerically resulting in suppression of the spin relaxation and a longer decay time of the polarized photoluminescence.

Open Research (University of Surrey)•Jan 1, 2006•0 citations

All-Optical Coherent Control of Spin Dynamics in Semiconductor Quantum Dots

Gabriela M. Slavcheva, Ortwin G. Hess

A new model for rigorous theoretical description of circularly (elliptically) polarized ultrashort optical pulse interactions with singly charged quantum dots embedded in semiconductor optical waveguides and microcavities is proposed. The method is based on self-consistent solution in the time domain of the vector Maxwell equations coupled via microscopic polarization to the coherent time-evolution equations of a discrete N-level quantum system in terms of the real pseudospin (coherence) vector. The model is applied to a 4-level system describing the optical dipole transitions of the trion state in a singly charged quantum dot. Selective optical excitation of specific spin states by predefined helicity of the optical field and an onset of self-induced transparency and polarized soliton formation in the nonlinear regime are numerically demonstrated

International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)•Sep 1, 2006•0 citations

All-optical Quantum Coherent Control of Electron Spin in Semiconductor Quantum Dots

Gabriela M. Slavcheva, Ortwin G. Hess

We develop and apply a new dynamical model for rigorous description of circularly (elliptically) polarized ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations for electromagnetic wave propagation coupled via macroscopic polarization to the coherent time‐evolution equations of a discrete N‐level system in terms of the real pseudospin (coherence) vector. We investigate theoretically the optically‐induced ultrafast resonant coherent spin dynamics in a singly charged semiconductor quantum dot. Onset of Rabi oscillations at sufficiently high excitation intensities is demonstrated numerically resulting in suppression of the spin relaxation and a longer decay time of the polarized photoluminescence.

AIP conference proceedings•Jan 1, 2007•0 citations

Spin‐dependent dynamics of ultrafast polarised optical pulse propagation in coherent semiconductor quantum systems

Gabriela M. Slavcheva, Ortwin G. Hess

Abstract A new model for rigorous theoretical description of circularly (elliptically) polarised ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides is proposed. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations coupled via microscopic polarisation to the coherent time‐evolution equations of a discrete N‐level quantum system in terms of the real pseudospin (coherence) vector. The model is initially applied to a generic two‐level quantum system and subsequently to a 4‐level system describing the heavy‐hole excitonic transitions in low‐dimensional semiconductor systems, such as quantum wells and quantum dots. Selective optical excitation of specific spin states by predefined helicity of the optical field in the linear regime and an onset of self‐induced transparency and polarised soliton formation in the nonlinear regime are numerically demonstrated in both discrete‐level systems. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics•Jul 5, 2006•6 citations
We extend [1] our new dynamical model [2,3] for resonant coherent circularly polarized optical pulse interactions with charged semiconductor quantum dots (QDs) to include dissipation in the system through the spin relaxation dynamics. A generalized pseudospin master equation is derived for description of the optically-induced time evolution of spin coherences and spin populations in terms of the real state pseudospin (coherence) vector. The equation is solved self-consistently with the vector Maxwell equations for the optical wave propagation coupled via macroscopic medium polarization. Using the model we demonstrate numerically coherent readout of a single spin polarization state exploiting the high-intensity Rabi oscillations regime. We show that coherent spin-polarization control can be achieved by varying the excitation intensity through the pulse area which allows for differentiation between the time traces of the polarized photoluminescence, thus enabling high-fidelity schemes for single spin detection. Longest-lived spin coherence is achieved for odd multiples of π-excitations.
The optically-induced coherent spin dynamics in a charged quantum dot (QD) is studied theoretically using a new dynamical model for rigorous description of circularly polarized ultrashort optical pulse resonant interactions with the electron-trion system. Generalized pseudospin master equation is derived for description of the time evolution of spin coherences and spin populations in terms of the real state pseudospin (coherence) vector including dissipation in the system through spin relaxation processes. The equation is solved in the time domain self-consistently with the vector Maxwell equations for the optical wave propagation coupled to it via macroscopic medium polarization. Using the model the long-lived electron spin coherence left behind a single resonant ultrashort optical excitation of the electron-trion transition in a charged QD is simulated in the lowand high-intensity Rabi oscillations regime. Signatures of the polarized photoluminescence (PL) resulting from the numerical simulations, such as the appearance of a second echo pulse after the excitation and a characteristic PL trace shape, specific for initial spin-up orientation, are discussed for realization of high-fidelity schemes for coherent readout of a single spin polarization state.
Abstract The optically‐induced coherent spin dynamics of a single spin confined in a charged quantum dot (QD) is theoretically studied employing coupled vector Maxwell‐pseudospin formalism. Generalized pseudospin master equation is derived for description of the time evolution of spin coherences and spin populations including spin population transfer and dissipation in the system through spin relaxation processes. The equation is solved in the time domain self‐consistently with the vector Maxwell equations for the optical wave propagation coupled to it via macroscopic medium polarisation. Using the model the long‐lived electron spin coherence left behind a single resonant ultrashort optical excitation of the electron‐trion transition in a charged QD is simulated in the low‐ and high‐intensity Rabi oscillations regime. Signatures of the polarised photoluminescence (PL), predicted by the model, such as the appearance of a second echo pulse after the excitation and characteristic PL trace shape, are discussed for realization of high‐fidelity schemes for coherent readout of a single spin polarisation state. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
We develop and apply a new dynamical model for rigorous description of circularly (elliptically) polarized ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations for electromagnetic wave propagation coupled via macroscopic polarization to the coherent time‐evolution equations of a discrete N‐level system in terms of the real pseudospin (coherence) vector. We investigate theoretically the optically‐induced ultrafast resonant coherent spin dynamics in a singly charged semiconductor quantum dot. Onset of Rabi oscillations at sufficiently high excitation intensities is demonstrated numerically resulting in suppression of the spin relaxation and a longer decay time of the polarized photoluminescence.
A new model for rigorous theoretical description of circularly (elliptically) polarized ultrashort optical pulse interactions with singly charged quantum dots embedded in semiconductor optical waveguides and microcavities is proposed. The method is based on self-consistent solution in the time domain of the vector Maxwell equations coupled via microscopic polarization to the coherent time-evolution equations of a discrete N-level quantum system in terms of the real pseudospin (coherence) vector. The model is applied to a 4-level system describing the optical dipole transitions of the trion state in a singly charged quantum dot. Selective optical excitation of specific spin states by predefined helicity of the optical field and an onset of self-induced transparency and polarized soliton formation in the nonlinear regime are numerically demonstrated
We develop and apply a new dynamical model for rigorous description of circularly (elliptically) polarized ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations for electromagnetic wave propagation coupled via macroscopic polarization to the coherent time‐evolution equations of a discrete N‐level system in terms of the real pseudospin (coherence) vector. We investigate theoretically the optically‐induced ultrafast resonant coherent spin dynamics in a singly charged semiconductor quantum dot. Onset of Rabi oscillations at sufficiently high excitation intensities is demonstrated numerically resulting in suppression of the spin relaxation and a longer decay time of the polarized photoluminescence.
Abstract A new model for rigorous theoretical description of circularly (elliptically) polarised ultrashort optical pulse interactions with the resonant nonlinearities in semiconductor optical waveguides is proposed. The method is based on self‐consistent solution in the time domain of the vector Maxwell equations coupled via microscopic polarisation to the coherent time‐evolution equations of a discrete N‐level quantum system in terms of the real pseudospin (coherence) vector. The model is initially applied to a generic two‐level quantum system and subsequently to a 4‐level system describing the heavy‐hole excitonic transitions in low‐dimensional semiconductor systems, such as quantum wells and quantum dots. Selective optical excitation of specific spin states by predefined helicity of the optical field in the linear regime and an onset of self‐induced transparency and polarised soliton formation in the nonlinear regime are numerically demonstrated in both discrete‐level systems. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)