极化子效应对非对称量子阱中光吸收系数的影响

于凤梅; 王克强; 申朝文

doi:null

您当前的位置：

首页 >

文章列表页 >

极化子效应对非对称量子阱中光吸收系数的影响

论文 | 更新时间：2020-08-12

- 极化子效应对非对称量子阱中光吸收系数的影响
- Influence of Polaron Effects on the Optical Absorptions in Asymmetrical Quantum Wells
- 发光学报 2010年31卷第4期页码：467-472
- 作者机构：
  
  仲恺农业工程学院信息学院,广东广州,510225
- 作者简介：
- 基金信息：
  
  广东省教育厅育苗工程项目(LYM08068)资助()
- DOI：
  中图分类号： O472.3
- 收稿日期：2009-11-23，
  
  修回日期：2010-01-25，
  
  网络出版日期：2010-08-27，
  
  纸质出版日期：2010-08-27
- 稿件说明：
移动端阅览
于凤梅, 王克强, 申朝文. 极化子效应对非对称量子阱中光吸收系数的影响[J]. 发光学报, 2010,31(4): 467-472

YU Feng-mei, WANG Ke-qiang, SHEN Chao-wen. Influence of Polaron Effects on the Optical Absorptions in Asymmetrical Quantum Wells[J]. 发光学报, 2010,31(4): 467-472
于凤梅, 王克强, 申朝文. 极化子效应对非对称量子阱中光吸收系数的影响[J]. 发光学报, 2010,31(4): 467-472 DOI：

YU Feng-mei, WANG Ke-qiang, SHEN Chao-wen. Influence of Polaron Effects on the Optical Absorptions in Asymmetrical Quantum Wells[J]. 发光学报, 2010,31(4): 467-472 DOI：

摘要

从理论上研究子电子-声子相互作用对Morse量子阱中光吸收系数的影响

首先利用微扰论方法求出考虑极化子效应时的电子波函数和能级

然后利用密度矩阵和迭代法得到光吸收系数的解析表达式

最后以典型的GaAs/AlGaAs Morse 量子阱为例进行数值计算。结果表明

极化子效应使光吸收系数比仅考虑电子的情况增大了

并且在相同光强的情况下吸收饱和现象更明显;极化子效应的影响随着阱的非对称性的增强而增大;电声相互作用对电子能级的修正导致光吸收系数峰值向高能方向偏移。

Abstract

The effect of the electron-phonon interaction on the optical absorptions is theoretically studied for electrons confined in Morse quantum wells. The wave functions and energy levels are described in Morse quantum well by perturbation theory when the electron-phonon interaction is considered

and analytic expression for the optical absorption is obtained by the compact density-matrix method and the iterative procedure. The numerical results for typical GaAs/AlGaAs material show that when considering the electron-phonon interaction the optical absorption coefficients are enhanced

and the total optical absorption is strongly bleached at the linear center. It is obtained that the larger the asymmetry of the quantum wells is

the sharper the peak will be when considering the electron-phonon interaction

and the greater influence of the polaron will be. Furthermore

the correction of electron-phonon interaction effect on the energies of the electron makes the peak shift to the aspect of the high energy.

关键词

Keywords

references

Peeters F M, Devreese J T. Scaling relations between the two- and three-dimensional polarons for static and dynamical properties

. Phys. Rev. B, 1987, 36 (8):4442-4445.

Wurentuya, Debulefu, Zhao Fengqi. Energy of polaron in wurterzide GaN/AlxGa1-xN quantum well

. Chin. J. Lumin. (发光学报), 2008, 29 (1):10-14 (in Chinese).

Hou Junhua, Liang Xixia. Ground state energy and effective mass of two dimensional acoustic polaron

. Chin. J. Lumin. (发光学报), 2008, 29 (4):670-674 (in English).

Thilagam A, Lohe M A. Coherent state polarons in quantum wells

. Physica E, 2005, 25 (4):625-635.

Zhang C J, Guo K X. Polaron effects on the optical absorptions in asymmetrical semi-parabolic quantum wells

. Physica E, 2007, 39 (1):103-108.

Chen Zhihong, Wang Junyan, Fang Tianhong. Effect of polaron on third order susceptibility in ZnS/CdSe quantum dot quantum well

. Chin. J. Lumin. (发光学报), 2009, 30 (4): 535-540 (in Chinese).

Shen Jiwei, Guo Xiangqun, Lu Peng, et al. Nonlinear optical properties of Si/SiNx superlattice

. Chin. J. Lumin. (发光学报), 2008, 29 (6):1045-1049 (in Chinese).

Yu Fengmei, Guo Kangxian, Xie Hongjing, et al. Intersubband optical absorption in Morse quantum well

. Chin. J. Lumin. (发光学报) , 2003, 24 (3):247-252 (in English).

Nieto M M, Simmons L M. Eigenstates, coherent states, and uncertainty products for the Morse oscillator

. Phys. Rev. A, 1979, 19 (2):438-444.

Adachi S. GaAs, AlAs, and Al</em>xGa1-xAs@B: Material parameters for use in research and device applications

. J. Appl. Phys., 1985, 58 (1):R1-R29.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

定量光声层析成像的研究进展

TiO₂禁带宽度和光吸收系数对其光催化性能的影响

Morse势阱中子带间的光吸收