- Tytuł:
- Emission from Mesoscopic-Size Islands Formed in a GaAs/AlAs Double Layer Structure
- Autorzy:
-
Wysmołek, A.
Chwalisz, B.
Potemski, M.
Stępniewski, R.
Babiński, A.
Raymond, S.
Thierry-Mieg, V. - Powiązania:
- https://bibliotekanauki.pl/articles/2038338.pdf
- Data publikacji:
- 2004-09
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
78.67.De
78.20.Ls
71.35.Lk
73.20.-r
78.47.+p - Opis:
- The nature of sharp emission lines which are present in macro-luminescence experiments on a type-II GaAs/AlAs double quantum well structure is discussed. The experiments, which also include micro-lumines- cence measurements, allowed us to conclude that the sharp emission lines observed originate from lateral GaAlAs islands of a fewμm in diameter. They serve as efficient type-I recombination centers for indirect excitons and/or carriers which diffuse in the GaAs/AlAs QW structure and strongly affect the emission processes observed in macro-luminescence experiments. These traps can easily be filled with electron-hole pairs, giving rise to the formation of neutral excitons as well as more complex excitonic molecules. Magneto-luminescence spectra from single islands resemble those observed for natural quantum dots formed in narrow GaAs quantum wells.
- Źródło:
-
Acta Physica Polonica A; 2004, 106, 3; 367-381
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł