- Tytuł:
- Enhanced Exciton-Phonon Interaction in Strained ZnCdSe/ZnSe Quantum Well Structures
- Autorzy:
-
Godlewski, M.
Leonardi, K.
Hommel, D. - Powiązania:
- https://bibliotekanauki.pl/articles/1968093.pdf
- Data publikacji:
- 1997-10
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
68.60.-p
76.70.Hb - Opis:
- Radiative recombination processes in pseudomorphic ZnCdSe/ZnSe structures are compared to those observed in strain-relaxed structures grown on GaAs substrates with thick ZnSe buffer layers. From the temperature dependence of the photoluminescence line width we evaluate the strength of exciton-phonon interaction with acoustic (dominant at lower temperatures) and optical phonons. Stronger exciton-phonon interaction is observed for pseudomorphic structures. Such enhanced exciton-phonon interaction is likely responsible for a faster photoluminescence deactivation at increased temperatures. We also report different exciton properties (photoluminescence intensity, width, strength of exciton-phonon interaction) in quantum well of a given width but in structures grown with different order of quantum wells. More stable photoluminescence (with increasing temperature) is observed for a given quantum well if it is closer to the buffer layer and not to the cap layer.
- Źródło:
-
Acta Physica Polonica A; 1997, 92, 4; 769-773
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł