- Tytuł:
- Optical Γ₆ → Γ₈ Free-to-Bound Transitions in Acceptor δ-Doped Single Heterostructure - Theoretical Analysis
- Autorzy:
-
Buczko, R.
Łusakowski, J.
Friedland, K.
Hey, R.
Ploog, K. - Powiązania:
- https://bibliotekanauki.pl/articles/1811919.pdf
- Data publikacji:
- 2008-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.70.Ej
78.67.De - Opis:
- A theoretical analysis was carried out of an optical transition observed in high-quality GaAs/AlGaAs heterostructures δ-doped with shallow acceptors. The transition involves a 2D electron and a 3D acceptor-localized hole. The wave functions of a bulk Be acceptor were calculated within the spherical model with both the s-like and d-like parts of the envelope taken into account. The electron envelope wave functions resulted from self-consistent calculations of the electrostatic potential and were dependent on the 2D electron concentration, $n_s$. We show that: (i) including the d-like part of the acceptor envelope relaxes the selection rules of free-to-bound transitions at k=0;(ii) in the magnetic field, the selection rules depend on the number of the electron Landau level;(iii) the ratio of the intensity of the strongest transitions in both circular polarizations is essentially different from 3:1, and strongly depends on $n_s$. These results show that a description that neglects the d-like part of the acceptor envelope is both qualitatively and quantitatively unjustified.
- Źródło:
-
Acta Physica Polonica A; 2008, 114, 5; 1079-1083
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł