Scattering-assisted terahertz gain in semiconductor superlattices in the Wannier-Stark-Ladder regime
(2006) In Physical Review B (Condensed Matter and Materials Physics) 74(12).- Abstract
- Using the second-order perturbation theory we have calculated the scattering assisted gain spectra in GaAs/AlGaAs superlattice under a strong applied electric field in the Wannier-Stark-Ladder (WSL) regime. Nonequilibrium distribution function of quasi-two-dimensional carriers localized in each WSL level and indirect optical transitions between neighboring WSL levels accompanied by the emission or absorption of acoustical phonons are taken into account in our theoretical analysis and numerical calculation. We have shown that the experimentally observed down shift of the zero-gain frequency from the Bloch oscillation frequency is due to the inelastic nature of the phonon scattering and the formation of excitons when electron-hole pairs are... (More)
- Using the second-order perturbation theory we have calculated the scattering assisted gain spectra in GaAs/AlGaAs superlattice under a strong applied electric field in the Wannier-Stark-Ladder (WSL) regime. Nonequilibrium distribution function of quasi-two-dimensional carriers localized in each WSL level and indirect optical transitions between neighboring WSL levels accompanied by the emission or absorption of acoustical phonons are taken into account in our theoretical analysis and numerical calculation. We have shown that the experimentally observed down shift of the zero-gain frequency from the Bloch oscillation frequency is due to the inelastic nature of the phonon scattering and the formation of excitons when electron-hole pairs are photoexcited. Our theoretical results agree well with the experimental data which were obtained from analyzing the THz response of superlattices to the picosecond optical pulse excitation. (Less)
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https://lup.lub.lu.se/record/389434
- author
- Tarakanov, Yu. A. ; Odnoblyudov, M. A. ; Chao, Koung-An LU ; Sekine, N. and Hirakawa, K.
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 74
- issue
- 12
- publisher
- American Physical Society
- external identifiers
-
- wos:000240872500070
- scopus:33749240204
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.74.125321
- language
- English
- LU publication?
- yes
- id
- f9bc88d6-3330-4c3d-bb2d-04e39a26d716 (old id 389434)
- date added to LUP
- 2016-04-01 16:51:54
- date last changed
- 2022-01-28 22:44:47
@article{f9bc88d6-3330-4c3d-bb2d-04e39a26d716,
abstract = {{Using the second-order perturbation theory we have calculated the scattering assisted gain spectra in GaAs/AlGaAs superlattice under a strong applied electric field in the Wannier-Stark-Ladder (WSL) regime. Nonequilibrium distribution function of quasi-two-dimensional carriers localized in each WSL level and indirect optical transitions between neighboring WSL levels accompanied by the emission or absorption of acoustical phonons are taken into account in our theoretical analysis and numerical calculation. We have shown that the experimentally observed down shift of the zero-gain frequency from the Bloch oscillation frequency is due to the inelastic nature of the phonon scattering and the formation of excitons when electron-hole pairs are photoexcited. Our theoretical results agree well with the experimental data which were obtained from analyzing the THz response of superlattices to the picosecond optical pulse excitation.}},
author = {{Tarakanov, Yu. A. and Odnoblyudov, M. A. and Chao, Koung-An and Sekine, N. and Hirakawa, K.}},
issn = {{1098-0121}},
language = {{eng}},
number = {{12}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Scattering-assisted terahertz gain in semiconductor superlattices in the Wannier-Stark-Ladder regime}},
url = {{http://dx.doi.org/10.1103/PhysRevB.74.125321}},
doi = {{10.1103/PhysRevB.74.125321}},
volume = {{74}},
year = {{2006}},
}