球型量子点中的电子拉曼散射

孙海超; 张玉芹; 刘翠红

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球型量子点中的电子拉曼散射

论文 | 更新时间：2020-08-12

- 球型量子点中的电子拉曼散射
- Electron Raman Scattering in Spherical Quantum Dots
- 发光学报 2009年30卷第4期页码：447-452
- 作者机构：
  
  广州大学物理电子工程学院,广东广州,510006
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： O472
- 收稿日期：2008-11-10，
  
  修回日期：1900-01-02，
  
  网络出版日期：2009-08-30，
  
  纸质出版日期：2009-08-30
- 稿件说明：
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孙海超, 张玉芹, 刘翠红. 球型量子点中的电子拉曼散射[J]. 发光学报, 2009,30(4):447-452.

SUN Hai-chao, ZHANG Yu-qin, LIU Cui-hong. Electron Raman Scattering in Spherical Quantum Dots[J]. Chinese journal of luminescence, 2009, 30(4): 447-452.
孙海超, 张玉芹, 刘翠红. 球型量子点中的电子拉曼散射[J]. 发光学报, 2009,30(4):447-452. DOI：

SUN Hai-chao, ZHANG Yu-qin, LIU Cui-hong. Electron Raman Scattering in Spherical Quantum Dots[J]. Chinese journal of luminescence, 2009, 30(4): 447-452. DOI：

摘要

研究了球型半导体量子点中的电子拉曼散射.讨论了初态为导带全满

价带全空时的电子跃迁过程

给出了电子拉曼散射的跃迁选择定则。通过计算GaAs和CdS材料球型量子点中电子及空穴参与拉曼散射的微分散射截面

分别比较了电子和空穴的不同影响

发现电子对拉曼散射的贡献要远大于空穴的贡献;当选取不同量子点半径时

拉曼散射微分散射截面变化也非常明显;量子点尺寸不变的条件下

改变入射光子能量

可以发现

微分散射截面随入射光子能量增大而减小。

Abstract

The differential cross-section (DCS) for electron Raman scattering (ERS) in a semiconductor spherical quantum dots was presented. The process of ERS neglects the phonon-assisted transcription and the electron states were confined with GaAs or CdS quantum dot system. Single parabolic conduction and valence bands were assumed. The contribution caused by electron and hole was contrasted separately. The selection rules for the process were also studied. Singularities in the spectra are interpreted for various quantum sizes and different incident photon energies.

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