中国物理B ›› 2012, Vol. 21 ›› Issue (10): 107102-107102.doi: 10.1088/1674-1056/21/10/107102

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

Optical absorption and electromagnetically induced transparency in semiconductor quantum well driven by intense terahertz field

吴宏伟, 米贤武   

  1. College of Physical Science and Mechanical Engineering, Jishou University, Jishou 416000, China
  • 收稿日期:2012-03-19 修回日期:2012-04-20 出版日期:2012-09-01 发布日期:2012-09-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10647132) and the Hunan Provincial Education Department-funded Project, China (Grant No. 10A100).

Optical absorption and electromagnetically induced transparency in semiconductor quantum well driven by intense terahertz field

Wu Hong-Wei (吴宏伟), Mi Xian-Wu (米贤武)   

  1. College of Physical Science and Mechanical Engineering, Jishou University, Jishou 416000, China
  • Received:2012-03-19 Revised:2012-04-20 Online:2012-09-01 Published:2012-09-01
  • Contact: Mi Xian-Wu E-mail:xwmi@yahoo.com.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10647132) and the Hunan Provincial Education Department-funded Project, China (Grant No. 10A100).

摘要: An approach for solving the excitonic absorption in a semiconductor quantum well driven by an intense terahertz field is presented. The formalism relies on the stationary single-photon Schrödinger equation in the full quantum mechanical framework. The optical absorption dynamics in both weak and strong couplings are discussed and compared. The excitonic absorption spectra show the Autler-Townes doublets for the resonance terahertz field, a replica peak for the non-resonance terahertz field, and the electromagnetically induced transparency phenomenon for modulating the decay rate of the second electron state in the weak coupling. In particular, the electromagnetically induced transparency phenomenon window range is discussed. In the strong coupling region,the multi-order energy level resonance splitting due to the strong optical field is found. There are three (non-resonance terahertz field) or four (resonance terahertz field) peaks in the optical absorption spectra. This work provides a simple and convenient approach to deal with the optical absorption in the exciton system.

关键词: semiconductor quantum well, optical absorption spectrum, terahertz field, electromagnetically induced transparency

Abstract: An approach for solving the excitonic absorption in a semiconductor quantum well driven by an intense terahertz field is presented. The formalism relies on the stationary single-photon Schrödinger equation in the full quantum mechanical framework. The optical absorption dynamics in both weak and strong couplings are discussed and compared. The excitonic absorption spectra show the Autler-Townes doublets for the resonance terahertz field, a replica peak for the non-resonance terahertz field, and the electromagnetically induced transparency phenomenon for modulating the decay rate of the second electron state in the weak coupling. In particular, the electromagnetically induced transparency phenomenon window range is discussed. In the strong coupling region,the multi-order energy level resonance splitting due to the strong optical field is found. There are three (non-resonance terahertz field) or four (resonance terahertz field) peaks in the optical absorption spectra. This work provides a simple and convenient approach to deal with the optical absorption in the exciton system.

Key words: semiconductor quantum well, optical absorption spectrum, terahertz field, electromagnetically induced transparency

中图分类号:  (Intrinsic properties of excitons; optical absorption spectra)

  • 71.35.Cc
78.20.Jq (Electro-optical effects) 71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)