Negative absorption coefficient of a weak electromagnetic wave caused by electrons confined in rectangular quantum wires in the presence of laser radiation
http://repository.vnu.edu.vn/handle/VNU_123/32541
Analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by electrons confined in rectangular quantum wires (RQWs) in the presence of laser radiation are calculated using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering.
The dependence of the ACF of a weak EMW on the intensity E 01 and the frequency Ω1 of the external laser radiation, the intensity E 02 and the frequency Ω2 of the weak EMW, the temperature T of the system and the size L (L x and L y) of the RQWs is obtained.
The results are numerically calculated and discussed for GaAs/GaAsAl RQWs.
The numerical results show that the ACF of a weak EMW in RQWs can have negative values.
Thus, in the presence of laser radiation, under proper conditions, a weak EMW is increased.
This is different from the similar problem in bulk semiconductors and from the case without laser radiation
Analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by electrons confined in rectangular quantum wires (RQWs) in the presence of laser radiation are calculated using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering.
The dependence of the ACF of a weak EMW on the intensity E 01 and the frequency Ω1 of the external laser radiation, the intensity E 02 and the frequency Ω2 of the weak EMW, the temperature T of the system and the size L (L x and L y) of the RQWs is obtained.
The results are numerically calculated and discussed for GaAs/GaAsAl RQWs.
The numerical results show that the ACF of a weak EMW in RQWs can have negative values.
Thus, in the presence of laser radiation, under proper conditions, a weak EMW is increased.
This is different from the similar problem in bulk semiconductors and from the case without laser radiation
| Title: | Negative absorption coefficient of a weak electromagnetic wave caused by electrons confined in rectangular quantum wires in the presence of laser radiation |
| Authors: | Bau, Nguyen Quang Nhan, Nguyen Thi Thanh Nhan, Nguyen Vu |
| Keywords: | Absorption coefficient Electron-phonon interaction Laser radiation Rectangular quantum wires |
| Issue Date: | 2014 |
| Publisher: | Journal of the Korean Physical Society |
| Citation: | Scopus |
| Abstract: | Analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by electrons confined in rectangular quantum wires (RQWs) in the presence of laser radiation are calculated using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The dependence of the ACF of a weak EMW on the intensity E 01 and the frequency Ω1 of the external laser radiation, the intensity E 02 and the frequency Ω2 of the weak EMW, the temperature T of the system and the size L (L x and L y) of the RQWs is obtained. The results are numerically calculated and discussed for GaAs/GaAsAl RQWs. The numerical results show that the ACF of a weak EMW in RQWs can have negative values. Thus, in the presence of laser radiation, under proper conditions, a weak EMW is increased. This is different from the similar problem in bulk semiconductors and from the case without laser radiation |
| Description: | Journal of the Korean Physical Society, Volume 64, Issue 4, February 2014, Pages 572-578 Journal of the Korean Physical Society |
| URI: | http://link.springer.com/article/10.3938%2Fjkps.64.572 http://repository.vnu.edu.vn/handle/VNU_123/32541 |
| ISSN: | 03744884 |
| Appears in Collections: | Bài báo của ĐHQGHN trong Scopus |
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