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

Optics and Spectroscopy

Coherent control of optical-phonon-assisted resonance secondary emission in semiconductor quantum dots

Федоров Анатолий Валентинович, Alexander V. Baranov, Yasuaki Masumoto

Published Jul 1, 2002• 18 citations
Publisher

Abstract

A new optical effect, the coherent control of spontaneous secondary emission with the participation of optical phonons in systems with discrete spectra of electronic transitions, is studied theoretically. Analytical formulas are obtained that describe the time-integrated signals of secondary emission excited resonantly by a pair of phase-locked pulses in the homogeneously and inhomogeneously broadened systems of semiconductor quantum dots. It is shown that coherent control is a promising method for measuring the total dephasing rates of a resonance optical transition. A physically justified criterion for discriminating between scattering and luminescence in the secondary emission is found. The role of spectral filtering of the signal in the measurements of phase and energy relaxation parameters is elucidated.

DOI
10.1134/1.1496724

Related papers

Coherent control of the quasi-elastic resonant secondary emission: Semiconductor quantum dots

Федоров Анатолий Валентинович, Alexander V. Baranov, Yasuaki Masumoto

A detailed theoretical study of the time-integrated signal of spontaneous quasi-elastic secondary emission excited by a pair of phase-locked pulses has shown that coherent control is a promising method for measuring the total dephasing rate of a resonant optical transition. This method may be used to study both the homogeneously and inhomogeneously broadened systems, which is highly important in studies of semiconductor quantum dots. Analysis of components of the secondary emission in the framework of the developed theory has allowed us to find a physically justified criterion for separating the scattering and luminescence signals. The role of spectral filtering of the measured signal in determination of the phase and energy relaxation parameters is elucidated.

Optics and Spectroscopy•May 1, 2002•12 citations

Coherent control of thermalized luminescence in semiconductor quantum dots

Федоров Анатолий Валентинович, Alexander V. Baranov, Yasuaki Masumoto

A theoretical study of the time-integrated signal of thermalized luminescence excited by a pair of phase-locked light pulses shows that the idea of coherent control should be efficient for measuring the total dephasing rates of high-energy excitonic transitions. This approach can be used for studying both the homogeneously and inhomogeneously broadened systems, which is highly important in studies of the semiconductor quantum dots. It is found that the method of coherent control makes it possible not only to obtain information about the relaxation constants but also to make conclusions about the statistical properties of frequency distributions of the excitonic transitions responsible for broadening the optical spectra.

Optics and Spectroscopy•Oct 1, 2002•7 citations

Two-Pulse Coherent Population of Quantum States in Inhomogeneous Ensemble Detected by the Phonon-Assisted Resonant Luminescence

Alexander V. Baranov, V. Davydov, Hong-Da Ren +3 more

The novel technique of coherent control of quantum states in semiconductor nanostructures was applied to the inhomogeneously broadened ensemble of quantum dots. By taking an advantage of the interaction between electronic states in quantum dots and phonons in the host matrix the inhomogeneous broadening was effectively eliminated. The coherence decay rate was measured.

•Jun 23, 2000•0 citations

Coherent control of resonant quantum well emission

N. Garro, Melissa Snelling, Simon Kennedy +2 more

We have investigated the manipulation of the phase and amplitude of the state of a three-level exciton system by excitation with pairs of phase-locked optical pulses. We demonstrate coherent control over the phase of quantum beating between the light- and heavy-hole excitons which are the components of the system. The state of the system is monitored by time-resolved detection of the resonant secondary emission coupled out of the system in non-phase-matched directions by virtue of the static disorder. We show that the amplitude of the coherent manipulation must diminish as a function of time delay between the components of the pulse pair in a way which takes into account both the dephasing of the excitons and their unphasing which arises from inhomogeneous broadening.

Journal of Physics Condensed Matter•Jul 22, 1999•7 citations

Spectral speckle analysis: a new method to measure coherence and dephasing in semiconductor nanostructures

Gerrit Kocherscheidt, W. Langbein, R. Zimmermann

A new method to measure the coherence of inhomogeneously broadened optical excitations in semiconductor nanostructures is presented. The secondary emission of excitons in semiconductor quantum wells is investigated. The spectrally-resolved coherence degree of resonantly-excited light emission is deduced from the intensity fluctuations over the emission directions (speckles). The spectral correlations of the speckles give direct access to the homogeneous line width as function of spectral position within the inhomogeneously broadened ensemble. The combination of static disorder and phonon scattering leads to a partially coherent emission. The temperature dependence of the homogeneous line width is well explained by phonon scattering.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 5, 2002•0 citations

Coherent Control of Resonant Rayleigh Scattering

Simon Kennedy, N. Garro, R. T. Phillips +1 more

Phase-locked pulse pairs are used for resonant excitation of excitons confined within GaAs/AlGaAs quantum wells. The time-resolved secondary emission displays strong dependence on the relative phases of the two pulses for inter-pulse delays of the order of 1ps or less. Constructive interference is combined with an increase in the rise time of the emission following the second pulse. For longer inter-pulse delays the different phases of inhomogeneous excitons complicate the effect of the second pulse, with the apparent effect changing with time after the second pulse. To model this, the optical Bloch equations for a line of three-level systems are integrated over time and the resulting polarisations summed over a range of angles. The importance of the inhomogeneity in descriptions of coherent control of secondary emission is shown.

physica status solidi (a)•Mar 1, 2000•3 citations
A new optical effect, the coherent control of spontaneous secondary emission with the participation of optical phonons in systems with discrete spectra of electronic transitions, is studied theoretically. Analytical formulas are obtained that describe the time-integrated signals of secondary emission excited resonantly by a pair of phase-locked pulses in the homogeneously and inhomogeneously broadened systems of semiconductor quantum dots. It is shown that coherent control is a promising method for measuring the total dephasing rates of a resonance optical transition. A physically justified criterion for discriminating between scattering and luminescence in the secondary emission is found. The role of spectral filtering of the signal in the measurements of phase and energy relaxation parameters is elucidated.
A detailed theoretical study of the time-integrated signal of spontaneous quasi-elastic secondary emission excited by a pair of phase-locked pulses has shown that coherent control is a promising method for measuring the total dephasing rate of a resonant optical transition. This method may be used to study both the homogeneously and inhomogeneously broadened systems, which is highly important in studies of semiconductor quantum dots. Analysis of components of the secondary emission in the framework of the developed theory has allowed us to find a physically justified criterion for separating the scattering and luminescence signals. The role of spectral filtering of the measured signal in determination of the phase and energy relaxation parameters is elucidated.
A theoretical study of the time-integrated signal of thermalized luminescence excited by a pair of phase-locked light pulses shows that the idea of coherent control should be efficient for measuring the total dephasing rates of high-energy excitonic transitions. This approach can be used for studying both the homogeneously and inhomogeneously broadened systems, which is highly important in studies of the semiconductor quantum dots. It is found that the method of coherent control makes it possible not only to obtain information about the relaxation constants but also to make conclusions about the statistical properties of frequency distributions of the excitonic transitions responsible for broadening the optical spectra.
We have investigated the manipulation of the phase and amplitude of the state of a three-level exciton system by excitation with pairs of phase-locked optical pulses. We demonstrate coherent control over the phase of quantum beating between the light- and heavy-hole excitons which are the components of the system. The state of the system is monitored by time-resolved detection of the resonant secondary emission coupled out of the system in non-phase-matched directions by virtue of the static disorder. We show that the amplitude of the coherent manipulation must diminish as a function of time delay between the components of the pulse pair in a way which takes into account both the dephasing of the excitons and their unphasing which arises from inhomogeneous broadening.
A new method to measure the coherence of inhomogeneously broadened optical excitations in semiconductor nanostructures is presented. The secondary emission of excitons in semiconductor quantum wells is investigated. The spectrally-resolved coherence degree of resonantly-excited light emission is deduced from the intensity fluctuations over the emission directions (speckles). The spectral correlations of the speckles give direct access to the homogeneous line width as function of spectral position within the inhomogeneously broadened ensemble. The combination of static disorder and phonon scattering leads to a partially coherent emission. The temperature dependence of the homogeneous line width is well explained by phonon scattering.
Phase-locked pulse pairs are used for resonant excitation of excitons confined within GaAs/AlGaAs quantum wells. The time-resolved secondary emission displays strong dependence on the relative phases of the two pulses for inter-pulse delays of the order of 1ps or less. Constructive interference is combined with an increase in the rise time of the emission following the second pulse. For longer inter-pulse delays the different phases of inhomogeneous excitons complicate the effect of the second pulse, with the apparent effect changing with time after the second pulse. To model this, the optical Bloch equations for a line of three-level systems are integrated over time and the resulting polarisations summed over a range of angles. The importance of the inhomogeneity in descriptions of coherent control of secondary emission is shown.