中国物理B ›› 2006, Vol. 15 ›› Issue (3): 649-653.doi: 10.1088/1009-1963/15/3/035

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

Terahertz field-induced modulations of intersubband absorptions in quantum wells

张拥华, 王长   

  1. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
  • 收稿日期:2005-10-22 修回日期:2005-12-07 出版日期:2006-03-20 发布日期:2006-03-20
  • 基金资助:
    Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant Nos 60425415 and 605280058),the Major Program of the National Natural Science Foundation of China (Grant No 10390162), and the Shanghai Municipal Commission of Science and Technology of China (Grant Nos 03JC14082 and 05XD14020).

Terahertz field-induced modulations of intersubband absorptions in quantum wells

Zhang Yong-Hua (张拥华), Wang Chang (王长)   

  1. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2005-10-22 Revised:2005-12-07 Online:2006-03-20 Published:2006-03-20
  • Supported by:
    Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant Nos 60425415 and 605280058),the Major Program of the National Natural Science Foundation of China (Grant No 10390162), and the Shanghai Municipal Commission of Science and Technology of China (Grant Nos 03JC14082 and 05XD14020).

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摘要： Nonlinear optical properties of intersubband electrons in a 3-level quantum well under intense terahertz field are investigated by using a density matrix approach. The results show that the terahertz fields with different frequencies cause the distinct modulations of the intersubband absorptions. The terahertz-induced sideband and Autler--Towns splitting in the absorption spectrum are obtained, respectively for the terahertz-photon energy below and close to the transition energy between the ground and first excited state.

Abstract: Nonlinear optical properties of intersubband electrons in a 3-level quantum well under intense terahertz field are investigated by using a density matrix approach. The results show that the terahertz fields with different frequencies cause the distinct modulations of the intersubband absorptions. The terahertz-induced sideband and Autler--Towns splitting in the absorption spectrum are obtained, respectively for the terahertz-photon energy below and close to the transition energy between the ground and first excited state.

Key words: terahertz field, intersubband transition, sideband absorption, AC-stark splitting

中图分类号:  (Quantum wells)

  • 78.67.De
73.21.Fg (Quantum wells)