中国物理B ›› 2005, Vol. 14 ›› Issue (11): 2314-2319.doi: 10.1088/1009-1963/14/11/028

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On the binding energies of excitons in polar quantum well structures in a weak electric field

BajaK.K.1, 吴云峰2, 梁希侠2   

  1. (1)Department of Physics, Emory University, Atlanta, GA 30322, USA; (2)Department of Physics, Inner Mongolia University, Hohhot 010021, China
  • 收稿日期:2005-05-16 修回日期:2005-06-27 出版日期:2005-11-20 发布日期:2005-11-20
  • 基金资助:
    Project supported in part by the National Natural Science Foundation of China (Grant No 10164003) and the Natural Science Foundation of Inner Mongol of China (Grant No 200408020101).

On the binding energies of excitons in polar quantum well structures in a weak electric field

Wu Yun-Feng (吴云峰)a, Liang Xi-Xia (梁希侠)a, K. K. Bajab    

  1. a Department of Physics, Inner Mongolia University, Hohhot 010021, China; b Department of Physics, Emory University, Atlanta, GA 30322, USA
  • Received:2005-05-16 Revised:2005-06-27 Online:2005-11-20 Published:2005-11-20
  • Supported by:
    Project supported in part by the National Natural Science Foundation of China (Grant No 10164003) and the Natural Science Foundation of Inner Mongol of China (Grant No 200408020101).

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摘要： The binding energies of excitons in quantum well structures subjected to an applied uniform electric field by taking into account the exciton longitudinal optical phonon interaction is calculated. The binding energies and corresponding Stark shifts for III--V and II--VI compound semiconductor quantum well structures have been numerically computed. The results for GaAs/AlGaAs and ZnCdSe/ZnSe quantum wells are given and discussed. Theoretical results show that the exciton--phonon coupling reduces both the exciton binding energies and the Stark shifts by screening the Coulomb interaction. This effect is observable experimentally and cannot be neglected.

关键词: quantum confined stark effects, exciton, quantum well

Abstract: The binding energies of excitons in quantum well structures subjected to an applied uniform electric field by taking into account the exciton longitudinal optical phonon interaction is calculated. The binding energies and corresponding Stark shifts for III--V and II--VI compound semiconductor quantum well structures have been numerically computed. The results for GaAs/AlGaAs and ZnCdSe/ZnSe quantum wells are given and discussed. Theoretical results show that the exciton--phonon coupling reduces both the exciton binding energies and the Stark shifts by screening the Coulomb interaction. This effect is observable experimentally and cannot be neglected.

Key words: quantum confined stark effects, exciton, quantum well

中图分类号:  (Quantum wells)

  • 73.21.Fg
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 71.35.Ee (Electron-hole drops and electron-hole plasma)