| RAUTERT, Janina, Timur S. SHAMIRZAEV, S. V. NEKRASOV, Dmitri R. YAKOVLEV, Petr KLENOVSKÝ, Yu. G. KUSRAYEV a Manfred BAYER. Optical orientation and alignment of excitons in direct and indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment. Online. Physical Review B. American Physical Society, 2019, roč. 99, č. 19, s. 195411-195420. ISSN 2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.99.195411. [citováno 2024-04-24] |
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@article{1529636,
author = {Rautert, Janina and Shamirzaev, Timur S. and Nekrasov, S. V. and Yakovlev, Dmitri R. and Klenovský, Petr and Kusrayev, Yu. G. and Bayer, Manfred},
article_number = {19},
doi = {http://dx.doi.org/10.1103/PhysRevB.99.195411},
keywords = {(InAl)As/AlAs;kvantove tecky;rekombinacni procesy},
language = {eng},
issn = {2469-9950},
journal = {Physical Review B},
title = {Optical orientation and alignment of excitons in direct and indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment},
url = {https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.195411},
volume = {99},
year = {2019}
}
TY - JOUR
ID - 1529636
AU - Rautert, Janina - Shamirzaev, Timur S. - Nekrasov, S. V. - Yakovlev, Dmitri R. - Klenovský, Petr - Kusrayev, Yu. G. - Bayer, Manfred
PY - 2019
TI - Optical orientation and alignment of excitons in direct and indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment
JF - Physical Review B
VL - 99
IS - 19
SP - 195411
EP - 195411
PB - American Physical Society
SN - 24699950
KW - (InAl)As/AlAs;kvantove tecky;rekombinacni procesy
UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.195411
L2 - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.195411
N2 - The spin structure and spin dynamics of excitons in an ensemble of (In,Al)As/AlAs quantum dots (QDs) with type-I band alignment, containing both direct and indirect band gap dots, are studied. Time-resolved and spectral selective techniques are used to distinguish between the direct and indirect QDs. The exciton fine structure is studied by means of optical alignment and optical orientation techniques in magnetic fields applied in the Faraday or Voigt geometries. A drastic difference in emission polarization is found for the excitons in the direct QDs involving a ?-valley electron and the excitons in the indirect QDs contributed by an X -valley electron. We show that in the direct QDs the exciton spin dynamics is controlled by the anisotropic exchange splitting, while in the indirect QDs it is determined by the hyperfine interaction with nuclear field fluctuations. The anisotropic exchange splitting is determined for the direct QD excitons and compared with model calculations.
ER -
RAUTERT, Janina, Timur S. SHAMIRZAEV, S. V. NEKRASOV, Dmitri R. YAKOVLEV, Petr KLENOVSKÝ, Yu. G. KUSRAYEV a Manfred BAYER. Optical orientation and alignment of excitons in direct and indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment. Online. \textit{Physical Review B}. American Physical Society, 2019, roč.~99, č.~19, s.~195411-195420. ISSN~2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.99.195411. [citováno 2024-04-24]
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