Electric field effect on the photoionization cross section of a single dopant in a strained AlAs/GaAs spherical core/shell quantum dot
Abstract
This paper reports a recent study on the polarizability and the photoionization cross section (PCS) of a hydrogenic impurity confined in a spherical AlAs/GaAs core/shell quantum dot under external electric field and hydrostatic pressure. In the framework of effective mass theory, a variational approach is used to determine the polarizability, binding energy, and the PCS of a single donor in a spherical core/shell quantum dot. Our numerical calculations reveal that all these fundamental parameters are deeply dependent on the core and shell radii. The study of the localization of the impurity inside the core/shell indicates that the Stark shift is more important when the impurity is positioned at the center of the core/shell and becomes less important when the donor moves toward the boundaries of the shell layer. In addition, a rapid decrease of the intensity of electric polarizability under hydrostatic pressure is observed. In order to understand the optical responses during the photoionization of the donor dopant, we investigated the PCS under hydrostatic pressure, electric field, ionized donor position, and core/shell sizes.
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1479129
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Name: Journal of Applied Physics Journal Volume: 124 Journal Issue: 16; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
Citation Formats
M’zerd, S., El Haouari, M., Aghoutane, M., El-Yadri, M., Feddi, E., Dujardin, F., Zorkani, I., Jorio, A., Sadoqi, M., and Long, G. Electric field effect on the photoionization cross section of a single dopant in a strained AlAs/GaAs spherical core/shell quantum dot. United States: N. p., 2018.
Web. doi:10.1063/1.5046859.
M’zerd, S., El Haouari, M., Aghoutane, M., El-Yadri, M., Feddi, E., Dujardin, F., Zorkani, I., Jorio, A., Sadoqi, M., & Long, G. Electric field effect on the photoionization cross section of a single dopant in a strained AlAs/GaAs spherical core/shell quantum dot. United States. https://doi.org/10.1063/1.5046859
M’zerd, S., El Haouari, M., Aghoutane, M., El-Yadri, M., Feddi, E., Dujardin, F., Zorkani, I., Jorio, A., Sadoqi, M., and Long, G. Thu .
"Electric field effect on the photoionization cross section of a single dopant in a strained AlAs/GaAs spherical core/shell quantum dot". United States. https://doi.org/10.1063/1.5046859.
@article{osti_1479129,
title = {Electric field effect on the photoionization cross section of a single dopant in a strained AlAs/GaAs spherical core/shell quantum dot},
author = {M’zerd, S. and El Haouari, M. and Aghoutane, M. and El-Yadri, M. and Feddi, E. and Dujardin, F. and Zorkani, I. and Jorio, A. and Sadoqi, M. and Long, G.},
abstractNote = {This paper reports a recent study on the polarizability and the photoionization cross section (PCS) of a hydrogenic impurity confined in a spherical AlAs/GaAs core/shell quantum dot under external electric field and hydrostatic pressure. In the framework of effective mass theory, a variational approach is used to determine the polarizability, binding energy, and the PCS of a single donor in a spherical core/shell quantum dot. Our numerical calculations reveal that all these fundamental parameters are deeply dependent on the core and shell radii. The study of the localization of the impurity inside the core/shell indicates that the Stark shift is more important when the impurity is positioned at the center of the core/shell and becomes less important when the donor moves toward the boundaries of the shell layer. In addition, a rapid decrease of the intensity of electric polarizability under hydrostatic pressure is observed. In order to understand the optical responses during the photoionization of the donor dopant, we investigated the PCS under hydrostatic pressure, electric field, ionized donor position, and core/shell sizes.},
doi = {10.1063/1.5046859},
journal = {Journal of Applied Physics},
number = 16,
volume = 124,
place = {United States},
year = {Thu Oct 25 00:00:00 EDT 2018},
month = {Thu Oct 25 00:00:00 EDT 2018}
}
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https://doi.org/10.1063/1.5046859
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