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- Title
Absorption of Far-Infrared Radiation in Ge/Si Quantum Dots.
- Authors
Sofronov, A.; Balagula, R.; Firsov, D.; Vorobjev, L.; Tonkikh, A.; Sarkisyan, H.; Hayrapetyan, D.; Petrosyan, L.; Kazaryan, E.
- Abstract
The experimental and theoretical results of studies of optical absorption in doped Ge/Si quantumdot structures in the far-infrared region, corresponding to the energies of transitions of holes from the ground state to the lowest excited size-quantization state, are reported. An analytical theory of the size quantization of holes in a lens-shaped quantum dot is developed in the context of the adiabatic approximation with consideration for pair Coulomb interaction. It is shown that the interaction has no effect on the frequencies of lower interlevel resonances. This fact is representative of generalized Kohn's theorem satisfied due to the specific geometric shape of the quantum dot. The experimental and theoretical values of the transition energies are in good agreement.
- Subjects
RADIATION absorption; QUANTUM dot synthesis; FAR infrared lasers; ABSORPTION spectra; ELECTRONIC spectra
- Publication
Semiconductors, 2018, Vol 52, Issue 1, p59
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782618010220