Absorption of Far-Infrared Radiation in Ge/Si Quantum Dots
- Authors: Sofronov A.N.1, Balagula R.M.1, Firsov D.A.1, Vorobjev L.E.1, Tonkikh A.A.2, Sarkisyan H.A.1,3, Hayrapetyan D.B.3, Petrosyan L.S.3,4, Kazaryan E.M.3
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Affiliations:
- St. Petersburg Polytechnic University
- OSRAM Opto Semiconductors GmbH
- Russian–Armenian University
- Jackson State University
- Issue: Vol 52, No 1 (2018)
- Pages: 59-63
- Section: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/202242
- DOI: https://doi.org/10.1134/S1063782618010220
- ID: 202242
Cite item
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.
About the authors
A. N. Sofronov
St. Petersburg Polytechnic University
Author for correspondence.
Email: sofronov@rphf.spbstu.ru
Russian Federation, St. Petersburg, 195251
R. M. Balagula
St. Petersburg Polytechnic University
Email: sofronov@rphf.spbstu.ru
Russian Federation, St. Petersburg, 195251
D. A. Firsov
St. Petersburg Polytechnic University
Email: sofronov@rphf.spbstu.ru
Russian Federation, St. Petersburg, 195251
L. E. Vorobjev
St. Petersburg Polytechnic University
Email: sofronov@rphf.spbstu.ru
Russian Federation, St. Petersburg, 195251
A. A. Tonkikh
OSRAM Opto Semiconductors GmbH
Email: sofronov@rphf.spbstu.ru
Germany, Regensburg, 93055
H. A. Sarkisyan
St. Petersburg Polytechnic University; Russian–Armenian University
Email: sofronov@rphf.spbstu.ru
Russian Federation, St. Petersburg, 195251; Yerevan, 0051
D. B. Hayrapetyan
Russian–Armenian University
Email: sofronov@rphf.spbstu.ru
Armenia, Yerevan, 0051
L. S. Petrosyan
Russian–Armenian University; Jackson State University
Email: sofronov@rphf.spbstu.ru
Armenia, Yerevan, 0051; Jackson, MS, 39217
E. M. Kazaryan
Russian–Armenian University
Email: sofronov@rphf.spbstu.ru
Armenia, Yerevan, 0051