中国物理B ›› 2002, Vol. 11 ›› Issue (7): 730-736.doi: 10.1088/1009-1963/11/7/316

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Surface optical phonon-assisted electron Raman scattering in a semiconductor quantum disc

马本堃1, 刘翠红2, 陈传誉3   

  1. (1)Department of Physics and Institute of Theoretical Physics, Beijing Normal University, Beijing 100875, China; (2)Department of Physics and Institute of Theoretical Physics, Beijing Normal University, Beijing 100875, China; Department of Physics, Guihuagang Campus, Guangzhou University, Guangzhou 510405, China; (3)Department of Physics, Guihuagang Campus, Guangzhou University, Guangzhou 510405, China
  • 收稿日期:2001-09-19 修回日期:2002-03-25 出版日期:2002-07-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Natural Science Foundation of Guangdong Province, China (Grant No 980378)

Surface optical phonon-assisted electron Raman scattering in a semiconductor quantum disc

Liu Cui-Hong (刘翠红)ab, Ma Ben-Kun (马本堃)a, Chen Chuan-Yu (陈传誉)b   

  1. a Department of Physics and Institute of Theoretical Physics, Beijing Normal University, Beijing 100875, China; b Department of Physics, Guihuagang Campus, Guangzhou University, Guangzhou 510405, China
  • Received:2001-09-19 Revised:2002-03-25 Online:2002-07-12 Published:2005-06-12
  • Supported by:
    Project supported by the Natural Science Foundation of Guangdong Province, China (Grant No 980378)

摘要: We have carried out a theoretical calculation of the differential cross section for the electron Raman scattering process associated with the surface optical phonon modes in a semiconductor quantum disc. Electron states are considered to be confined within a quantum disc with infinite potential barriers. The optical phonon modes we have adopted are the slab phonon modes by taking into consideration the Fr?hlich interaction between an electron and a phonon. The selection rules for the Raman process are given. Numerical results and a discussion are also presented for various radii and thicknesses of the disc, and different incident radiation energies.

Abstract: We have carried out a theoretical calculation of the differential cross section for the electron Raman scattering process associated with the surface optical phonon modes in a semiconductor quantum disc. Electron states are considered to be confined within a quantum disc with infinite potential barriers. The optical phonon modes we have adopted are the slab phonon modes by taking into consideration the Fr?hlich interaction between an electron and a phonon. The selection rules for the Raman process are given. Numerical results and a discussion are also presented for various radii and thicknesses of the disc, and different incident radiation energies.

Key words: Raman scattering, surface optical phonon modes, quantum disc

中图分类号:  (III-V and II-VI semiconductors)

  • 78.30.Fs
73.21.La (Quantum dots) 73.20.At (Surface states, band structure, electron density of states)