| 1. |
- Godlewski, M, et al.
(författare)
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Interaction of microwave heated hot carriers with recombination centers
- 2002
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Ingår i: Materials Science Forum, Vols. 389-393. ; , s. 19-26
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Konferensbidrag (refereegranskat)abstract
- We describe application of the technique of optically detected cyclotron resonance (ODCR) to the studies of exciton properties in quantum well structures of CdTe/CdMnTe in the limit of strong localization effects. Microwave-heated free carriers, at cyclotron resonance conditions, can site- or impurity-delocalise excitons, resulting in a strong modification of a low temperature photoluminescence. In consequence, the ODCR allows to study processes of carrier/exciton localization. We show that localization effects are very strong in quantum well structures of CdTe/CdMnTe with large Mn fractions in the CdMnTe barriers.
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| 2. |
- Godlewski, M, et al.
(författare)
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Mechanism of intra-shell recombination of transition metal and rare earth ions in nanostructures of II-VI compounds
- 2004
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Ingår i: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388 .- 1873-4669. ; 380:01-Feb, s. 45-49
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Tidskriftsartikel (refereegranskat)abstract
- Based on the results of optically detected magnetic resonance (ODMR) and time-resolved investigations we relate the observed lifetime shortening of intra-shell Mn2+ emission to spin dependent magnetic interactions between localized spins of Mn2+ ions and spins/magnetic moments of free carriers. We show that this mechanism is active both in bulk and in low dimensional structures, such as quantum wells (QWs), quantum dots (QDs) and nanostructures. (C) 2004 Elsevier B.V. All rights reserved.
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| 3. |
- Ivanov, VY, et al.
(författare)
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Microwave-induced delocalization of excitons in ternary compounds of II-VI and III-V semiconductors
- 2003
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Ingår i: Acta Physica Polonica. A. - 0587-4246 .- 1898-794X. ; 103:6, s. 559-566
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Tidskriftsartikel (refereegranskat)abstract
- In this work we employ technique of optically detected cyclotron resonance for evaluation of the role of localization processes in CdTe/CdMnTe and CdMnTe/CdMgTe quantum well structures. From microwave-induced changes of excitonic emissions we evaluate magnitude of potential fluctuations (Stokes shift), correlate optically detected cyclotron resonance results with the results of time-resolved experiments and discuss nature of recombination processes in the limit of a strong localization.
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