Theory of impurity states in coupled quantum wells and superlattices and their infrared absorption spectra

被引：0
|
作者：
Stehr, D. [1 ]
Helm, M. [1 ]
Metzner, C. [2 ]
Wanke, M. C. [3 ]
机构：
[1] Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, POB 510119, D-01314 Dresden, Germany
[2] Univ Erlangen Nurnberg, Ctr Med Phys & Technol, Biophys Grp, D-91052 Erlangen, Germany
[3] Sandia Natl Labs, Albuquerque, NM 87185 USA
来源：
PHYSICS OF SEMICONDUCTORS, PTS A AND B | 2007年 / 893卷
基金：
美国能源部;
关键词：
intersubband; impurities; quantum well; superlattice;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a theory of impurity states in quantum wells, where the confining potential of the heterostructure and the random impurity potential are treated in a unified theory. After diagonalization of the 3D Hamiltonian we calculate the infrared absorption spectrum. We discuss the nature of impurity states that are confined in the quantum wells and their influence on the absorption spectra. We then calculate the absorption spectra for a quadruple quantum well, revealing impurity transitions as well as intersubband transitions. The results are compared to existing experimental data and show a remarkable agreement.
引用
收藏
页码：243 / +
页数：2
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