Autor: Yu, M - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spin Relaxation Processes in Quantum Well Structures of Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te/Cd$\text{}_{1-x}$Mg$\text{}_{x}$Te
Autorzy:: Khachapuridze, A.
Ivanov, V. Yu.
Godlewski, M.
Karczewski, G.
Powiązania:: https://bibliotekanauki.pl/articles/2035595.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.Ji
72.25.Rb
76.70.Hb
78.55.Et
Opis:: Fast spin relaxation of Mn$\text{}^{2+}$ ions in a magnetic quantum well of CdMnTe with 1% Mn fraction is related to a very efficient spin-flip interaction between Mn ions and free carriers. This mechanism of spin relaxation becomes dominant at increased excitation densities. The observed response of the photoluminescence bands to the Mn$\text{}^{2+}$ magnetic resonance indicates that free carriers are heated at the magnetic resonance conditions. A decrease in formation/recombination rates of free and trion excitons is observed. Donor bound exciton photoluminescence is enhanced, which we relate to delocalization of free excitons, caused by interaction with microwave heated free carriers.
Źródło:: Acta Physica Polonica A; 2002, 102, 4-5; 643-648
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Mechanism of Radiative Mn$\text{}^{2+}$ Intra-Shell Recombination in Bulk ZnMnS
Autorzy:: Ivanov, V. Yu.
Godlewski, M.
Yatsunenko, S.
Khachapuridze, A.
Li, M. S.
Gołacki, Z.
Powiązania:: https://bibliotekanauki.pl/articles/2027501.pdf
Data publikacji:: 2001-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Gs
76.30.Fc
76.70.Hb
78.55.Et
Opis:: Origin of a fast component of the photoluminescence decay of Mn$\text{}^{2+}$ intra-shell $\text{}^{4}$T$\text{}_{1}$ → $\text{}^{6}$A$\text{}_{1}$ transition is discussed based on the results of photoluminescence, photoluminescence kinetics and optically detected magnetic resonance experiments performed for bulk ZnMnS samples with about 1% Mn fraction. It is demonstrated that a fast component of the photoluminescence decay, reported previously for quantum dot structure and related to quantum confinement effects, is also observed in bulk samples and is related by us to very efficient spin cross-relaxation effects.
Źródło:: Acta Physica Polonica A; 2001, 100, 3; 351-355
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Origin of Ultrafast Component of Photoluminescence Decay in Nanostructures Doped with Transition Metal or Rare-Earth Ions
Autorzy:: Godlewski, M.
Yatsunenko, S.
Ivanov, V. Yu.
Khachapuridze, A.
Świątek, K.
Goldys, E. M.
Phillips, M. R.
Klar, P. J.
Heimbrodt, W.
Powiązania:: https://bibliotekanauki.pl/articles/2041630.pdf
Data publikacji:: 2005-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Gs
76.30.Fc
76.70.Hb
78.55.Et
Opis:: Bulk samples, layers, quantum well, and quantum dot structures of II-Mn-VI samples all show coexistence of slow and fast components of Mn$\text{}^{2+}$ photoluminescence decay. Thus, fast photoluminescence decay cannot be related to low dimensionality of a host material. This also means that the model of the so-called quantum confined atom is incorrect. Based on the results of time-resolved photoluminescence and optically detected magnetic resonance investigations we relate the observed lifetime decrease in Mn$\text{}^{2+}$ intra-shell transition to spin dependent magnetic interactions between localized spins of Mn$\text{}^{2+}$ ions and between Mn$\text{}^{2+}$ ions and spins/magnetic moments of free carriers. The latter mechanism is enhanced in nanostructures.
Źródło:: Acta Physica Polonica A; 2005, 107, 1; 65-74
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Spin Dependent Interactions of Free Carriers and Manganese Ions in Nanostructures of Wide Band Gap II-Mn-VI Semiconductors - Mechanism of Lifetime Reduction
Autorzy:: Yatsunenko, S.
Khachapuridze, A.
Ivanov, V. Yu.
Godlewski, M.
Khoi, Le Van
Gołacki, Z.
Karczewski, G.
Goldys, E. M.
Phillips, M.
Klar, P. J.
Heimbrodt, W.
Powiązania:: https://bibliotekanauki.pl/articles/2036034.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Gs
76.30.Fc
76.70.Hb
78.55.Et
Opis:: Based on the results of optically detected magnetic resonance and time-resolved investigations we relate the observed lifetime shortening of intra-shell Mn$\text{}^{2+}$ emission to spin dependent magnetic interactions between localized spins of Mn$\text{}^{2+}$ ions and spins/magnetic moments of free carriers. We show that this mechanism is active in both bulk and in low dimensional structures, such as quantum wells, quantum dots, and nanostructures.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 643-648
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Microwave-Induced Delocalization of Excitons in Ternary Compounds of II-VI and III-V Semiconductors
Autorzy:: Ivanov, V. Yu.
Godlewski, M.
Khachapuridze, A.
Yatsunenko, S.
Wojtowicz, T.
Karczewski, G.
Bergman, J. P.
Monemar, B.
Shamirzaev, T.
Zhuravlev, K.
Leonardi, K.
Hommel, D.
Powiązania:: https://bibliotekanauki.pl/articles/2035757.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.Ji
72.25.Rb
76.70.Hb
78.55.Et
Opis:: 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.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 559-566
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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