Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 8

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Magnetoluminescence of a CdTe Quantum Dot with a Single Manganese Ion in Voigt Configuration

100%
Koperski M., Goryca M., Kazimierczuk T., Kossacki P., Wojnar P., Gaj J.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 5
618-620
EN
We present a study of the neutral exciton and negative trion recombination spectra of an individual CdTe quantum dot with a single manganese ion, in magnetic field measured in the Voigt configuration. We describe experimental results and compare with a theoretical model. The quantitative agreement between the model and the experiment allows us to determine separately the electron g-factor.
2
Content available remote

Numerical Rate Equation Approach to Picosecond Charge State Dynamics in CdTe/ZnTe Quantum Dots

100%
Koperski M., Kazimierczuk T., Goryca M., Wojnar P., Golnik A., Kossacki P., Gaj J.
Acta Physica Polonica A
|
2009
|
vol. 116
|
issue 5
893-895
EN
The rate equation is used for description of photoluminescence dynamics after pulsed excitation of various states of quantum dots. The picosecond dynamics of averaged charge state of quantum dot is described. We compare our simulations with the experiment and come up with the conclusion that probability of carrier capture weakly depends on quantum dot charge state and that electrons and holes are captured non-synchronously.
3
Content available remote

The Novel Multichannel Single Photon Correlations Technique Applied for the Spin Dynamics Study of a Few Mn^{2+} Ions in a CdTe/ZnTe Quantum Dot

100%
Malinowski F., Koperski M., Goryca M., Smoleński T., Golnik A., Kossacki P., Wojnar P.
Acta Physica Polonica A
|
2013
|
vol. 124
|
issue 5
791-794
EN
In this work we demonstrate a novel experimental approach to the study of single photon correlations. The introduction of the multichannel detection setup enables the simultaneous measurement of a large number of correlation functions for photons emitted from different energetic ranges. The advantages of this new approach were exploited in a detailed study of the biexciton-exciton recombination cascade in CdTe/ZnTe quantum dots doped with a few Mn^{2+} ions. The information about the dynamics of the magnetic system in the quantum dot during the lifetime of the exciton was obtained from the analysis of the correlation functions.
4
Content available remote

Resonant Excitation of CdTe/ZnTe Quantum Dot Pairs as a Tool for Spectroscopic Study of the Excitonic p-States

100%
Bogucki A., Smoleński T., Goryca M., Koperski M., Wojnar P., Kossacki P.
Acta Physica Polonica A
|
2013
|
vol. 124
|
issue 5
788-790
EN
We propose a new method of obtaining a photoluminescence spectrum of a single quantum dot in a self-assembled system of CdTe/ZnTe quantum dots. The method is based on the resonant excitation of a coupled dots pair. The comparison of the spectra in resonance and out of resonance enables the identification of a well-isolated lines related to the excitonic p-states. The application of the method allows the basic characterisation of a quantum dot, including the measurements of linear anisotropy, the excitation power dependence, and the analysis of the photoluminescence in the magnetic field.
5
Content available remote

Statistical Study of the Inter-Dot Excitation Transfer in CdTe/ZnTe Quantum Dots

84%
Koperski M., Kazimierczuk T., Goryca M., Golnik A., Gaj J., Nawrocki M., Wojnar P., Kossacki P.
Acta Physica Polonica A
|
2011
|
vol. 120
|
issue 5
880-882
EN
In this work we present a statistical study of resonantly excited luminescence of coupled CdTe/ZnTe quantum dots studied by photoluminescence excitation measurements. We investigate the probability of resonance occurrence as a function of resonant energy. We come to the conclusion that the distribution of the inter-dot resonances is uniform, which suggests that the inter-dot excitation transfer is not limited by mean density of states in the emitting quantum dots.
6
Content available remote

Excitation Mechanisms of CdTe/ZnTe Quantum Dots under Non-Resonant and Quasi-Resonant Regime

84%
Kazimierczuk T., Gaj J., Golnik A., Goryca M., Nawrocki M., Koperski M., Smoleński T., Suffczyński J., Wojnar P., Kossacki P.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 5
588-591
EN
We discuss possible mechanisms of quantum dot population control. A set of experiments, including time-resolved photoluminescence, single photon correlations, excitation correlation, and photoluminescence excitation is used to determine the actual mechanism under non-resonant and quasi-resonant regime.
7
Content available remote

Spin-Related Spectroscopy of CdTe-Based Quantum Dots

84%
Gaj J., Kazimierczuk T., Goryca M., Koperski M., Golnik A., Kossacki P., Nawrocki M., Wojnar P., Karczewski G.
|
EN
This work contains a selection of our recent experimental results in the field of the spin-related spectroscopy of individual CdTe-based quantum dots. After a short description of the sample growth and experimental methods, optical measurements of the charge state dynamics are presented. Then the influence of in-plane anisotropy of the excitonic states of a quantum dot is discussed, followed by a description of experimental studies of information read-out and writing on quantum dot spin states. In particular, spin memory of a single Mn^{++} ion embedded in a CdTe quantum dot is quantitatively assessed. In an outlook part, perspectives opened by recently developed ZnTe lattice-matched Bragg reflectors are discussed.
8
Content available remote

Properties of Excitons in Quantum Dots with a Weak Confinement

68%
Gołasa K., Molas M., Goryca M., Kazimierczuk T., Smoleński T., Koperski M., Golnik A., Kossacki P., Potemski M., Wasilewski Z., Babiński A.
Acta Physica Polonica A
|
2013
|
vol. 124
|
issue 5
781-784
EN
Statistical properties of neutral excitons, biexcitons and trions confined to natural quantum dots formed in the InAs/GaAs wetting layer are reported. The correlation of the trion binding energy and the biexciton binding energy was found. Magnetospectroscopic measurements of the excitons revealed also the correlation of excitonic effective g^* factor of an exciton with the biexciton binding energy. The qualitative picture of the effect of quantum confinement on the observed correlations is presented.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.