中国物理B ›› 1993, Vol. 2 ›› Issue (4): 286-299.doi: 10.1088/1004-423X/2/4/007

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

PROPERTIES OF PROPAGATION OF GUIDED ELECTRON WAVES IN COUPLED ASYMMETRIC QUANTUM WELLS

袁世齐, 顾本源   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1992-10-07 出版日期:1993-04-20 发布日期:1993-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China and in part by the Grant LWTZ-1298 of the Chinese Academy of Sciences.

PROPERTIES OF PROPAGATION OF GUIDED ELECTRON WAVES IN COUPLED ASYMMETRIC QUANTUM WELLS

YUAN SHI-QI (袁世齐), GU BEN-YUAN (顾本源)   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1992-10-07 Online:1993-04-20 Published:1993-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China and in part by the Grant LWTZ-1298 of the Chinese Academy of Sciences.

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摘要： In this article we investigate the properties of the propagation of guided electron waves in the coupled asymmetric quantum wells. By decomposing the eigenfunctions of electron in the coupled double quantum wells in terms of the basis eigenfunctions of the individual wells, the expression of the mode amplitude func-tions for various bare states in wells has been given. By setting up appropriate boundary conditions one can simulate different injecting manners of electron into the system and study how the electron waves trans-fer among various states. The major electron wave transfer happens between the matching bare states in wells. The particular pattern of the transfer depends on the injecting manner and the energy of the inci-dent electron. We also show the influence of the presence of the multimodes on the variatinn of the mode amplitude functions. It leads to producing some oscillations imposed on the original sinusoidal-like func-tions and causing incomplete transfer between a pair of states in channels due to the beating frequency effect or the interference among various modes.

Abstract: In this article we investigate the properties of the propagation of guided electron waves in the coupled asymmetric quantum wells. By decomposing the eigenfunctions of electron in the coupled double quantum wells in terms of the basis eigenfunctions of the individual wells, the expression of the mode amplitude func-tions for various bare states in wells has been given. By setting up appropriate boundary conditions one can simulate different injecting manners of electron into the system and study how the electron waves trans-fer among various states. The major electron wave transfer happens between the matching bare states in wells. The particular pattern of the transfer depends on the injecting manner and the energy of the inci-dent electron. We also show the influence of the presence of the multimodes on the variatinn of the mode amplitude functions. It leads to producing some oscillations imposed on the original sinusoidal-like func-tions and causing incomplete transfer between a pair of states in channels due to the beating frequency effect or the interference among various modes.

中图分类号:  (Quantum wells)

  • 73.63.Hs
73.40.Kp (III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor)