Open AccessПоглощение излучения дальнего инфракрасного диапазона квантовыми точками Ge/Si
Author(s) -
А.Н. Софронов,
Р.М. Балагула,
Д.А. Фирсов,
Л.Е. Воробьев,
A. A. Tonkikh,
А.А. Саркисян,
Д.Б. Айрапетян,
Л.С. Петросян,
Э.М. Казарян
Publication year - 2018
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2018.01.45320.8655
Subject(s) - quantization (signal processing) , coulomb , excited state , quantum dot , adiabatic theorem , adiabatic process , physics , ground state , condensed matter physics , quantum mechanics , second quantization , quantum , atomic physics , mathematics , electron , creation and annihilation operators , algorithm
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.