Autor: Kochereshko, V. P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Excitonic Polaritons in Transverse Magnetic Fields
Autorzy:: Loginov, D.
Kochereshko, V. P.
Litvinov, A.
Besombes, L.
Mariette, H.
Davies, J. J.
Smith, L. C.
Wolverson, D.
Powiązania:: https://bibliotekanauki.pl/articles/2047705.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.-y
71.35.Ji
78.20.Ls
78.67.De
Opis:: Reflectivity spectra taken from wide quantum wells based on CdTe/CdZnTe and GaAs/AlGaAs (in which the well width is much larger than the exciton Bohr radius) were studied in magnetic fields in the plane of the well (the Voigt geometry). The energy splitting between bright and dark excitons and the redistribution of the oscillator strength from bright to dark was observed and this allowed us to determine the exciton exchange constantΔ. We found that exciton translational mass depends on the value of magnetic field. Additionally, we found that diamagnetic shift also depends on exciton wave vector. Changes in the spectra in the range of the overlap of heavy and light hole exciton resonances were observed when the magnetic field was inverted. Theoretical modeling of the spectra allowed us to explain all the observed features in the reflectivity spectra and to determine some material parameters.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 381-386
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Optical Anisotropy of ZnSe/BeTe Superlattices Probed by Excitonic Spectroscopy
Autorzy:: Platonov, A. V.
Kochereshko, V. P.
Ivchenko, E. L.
Yakovlev, D.
Ossau, W.
Fischer, F.
Waag, A.
Landwehr, G.
Powiązania:: https://bibliotekanauki.pl/articles/1992063.pdf
Data publikacji:: 1998-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Et
78.66.-w
78.66.Hf
Opis:: Photoluminescence spectra of type-II ZnSe/BeTe superlattices were studied. A linear polarised photoluminescence has been found in the spectral range of spatially indirect exciton transitions. This observation is interpreted in a model of optical anisotropy of heterostructures with no-common atom at interfaces.
Źródło:: Acta Physica Polonica A; 1998, 94, 3; 479-482
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Exciton States in Type-II ZnSe/BeTe Quantum Wells
Autorzy:: Platonov, A. V.
Yakovlev, D. R.
Zehnder, U.
Kochereshko, V. P.
Ossau, W.
Fischer, F.
Litz, Th.
Waag, A.
Landwehr, G.
Powiązania:: https://bibliotekanauki.pl/articles/1968413.pdf
Data publikacji:: 1997-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.20.Ls
78.66.Hf
Opis:: We present an optical investigation of novel heterostructures based on beryllium chalcogenides with a type-I and type-II band alignment. In the type-II quantum well structures (ZnSe/BeTe) we observed a strong exciton transition involving an electron confined in the conduction band well and a hole localized in the valence band barrier (both in ZnSe layer). This transition is drastically broadened by the temperature increase due to enhanced exciton-acoustic phonon interaction.
Źródło:: Acta Physica Polonica A; 1997, 92, 5; 953-957
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Model Study of Inhomogeneous Line Broadening in Excitonic Spectra of Quantum Wells
Autorzy:: Astakhov, G. V.
Kochereshko, V. P.
Kosobukin, V. A.
Yakovlev, D. R.
Wojtowicz, T.
Karczewski, G.
Kossut, J.
Ossau, W.
Landwehr, G.
Powiązania:: https://bibliotekanauki.pl/articles/1969005.pdf
Data publikacji:: 1998-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.20.Ci
78.66.-w
Opis:: An approach is proposed to estimate separately parameters of homogeneous and inhomogeneous broadenings from an optical reflection line of a quasi-2D exciton. A phenomenological model is proposed to take into account statistically an inhomogeneous broadening of the exciton resonant spectra. The concept is applied to study a modulation-doped heterostructures with a single quantum well CdTe/CdMgTe. From exciton reflection lines taken in a magnetic field the temperature-dependent homogeneous and inhomogeneous broadening parameters as well as the exciton radiative decay rate are measured.
Źródło:: Acta Physica Polonica A; 1998, 94, 2; 235-239
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Excitons and Trions in Modulation Doped Structures in High Magnetic Fields
Autorzy:: Kochereshko, V.
Andronikov, D.
Platonov, A.
Crooker, S.
Barrick, T.
Karczewski, G.
Tronc, P.
Powiązania:: https://bibliotekanauki.pl/articles/2038321.pdf
Data publikacji:: 2004-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Et
71.35.-y
78.20.Ls
78.40.Fy
Opis:: Photoluminescence spectra of modulation-doped CdTe/CdMgTe quantum well structures containing two-dimensional electron gases of low, moderate and high electron concentrations were studied in high magnetic fields up to 45 T. The recombination line of triplet trion state was found in the spectra. A model calculation of photoluminescence spectra in magnetic fields, which takes into account singlet and triplet trion states, was carried out. It was shown that the dark triplet becomes observable in photoluminescence spectra because it becomes the only recombination channel when the formation of the singlet trion state is suppressed by magnetic fields.
Źródło:: Acta Physica Polonica A; 2004, 106, 3; 319-328
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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