中国物理B ›› 2016, Vol. 25 ›› Issue (1): 14202-014202.doi: 10.1088/1674-1056/25/1/014202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Steady-state linear optical properties and Kerr nonlinear optical response of a four-level quantum dot with phonon-assisted transition

Yan-Chao She(佘彦超), Ting-Ting Luo(罗婷婷), Wei-Xi Zhang(张蔚曦),Mao-Wu Ran(冉茂武), Deng-Long Wang(王登龙)   

  1. 1. College of Physics and Electronic Engineering, Tongren University, Tongren 554300, China;
    2. School of Physics and Optoelectronices, Xiangtan University, Xiangtan 411105, China
  • 收稿日期:2015-05-15 修回日期:2015-08-14 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: Yan-Chao She, Deng-Long Wang E-mail:sheyanchao316@163.com;dlwang@xtu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61367003), the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 12A140), and the Scientific Research Fund of Guizhou Provincial Education Department, China (Grant Nos. KY[2015]384 and KY[2015]446).

Steady-state linear optical properties and Kerr nonlinear optical response of a four-level quantum dot with phonon-assisted transition

Yan-Chao She(佘彦超)1,2, Ting-Ting Luo(罗婷婷)2, Wei-Xi Zhang(张蔚曦)1,Mao-Wu Ran(冉茂武)1, Deng-Long Wang(王登龙)2   

  1. 1. College of Physics and Electronic Engineering, Tongren University, Tongren 554300, China;
    2. School of Physics and Optoelectronices, Xiangtan University, Xiangtan 411105, China
  • Received:2015-05-15 Revised:2015-08-14 Online:2016-01-05 Published:2016-01-05
  • Contact: Yan-Chao She, Deng-Long Wang E-mail:sheyanchao316@163.com;dlwang@xtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61367003), the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 12A140), and the Scientific Research Fund of Guizhou Provincial Education Department, China (Grant Nos. KY[2015]384 and KY[2015]446).

摘要: The linear optical properties and Kerr nonlinear optical response in a four-level loop configuration GaAs/AlGaAs semiconductor quantum dot are analytically studied with the phonon-assisted transition (PAT). It is shown that the changes among a single electromagnetically induced transparency (EIT) window, a double EIT window and the amplification of the probe field in the absorption curves can be controlled by varying the strength of PAT κ. Meanwhile, double switching from the anomalous dispersion regime to the normal dispersion regime can likely be achieved by increasing the Rabi energy of the external optical control field. Furthermore, we demonstrate that the group velocity of the probe field can be practically regulated by varying the PAT and the intensity of the optical control field. In the nonlinear case, it is shown that the large SPM and XPM can be achieved as linear absorption vanishes simultaneously, and the PAT can suppress both third-order self-Kerr and the cross-Kerr nonlinear effect of the QD. Our study is much more practical than its atomic counterpart due to its flexible design and the controllable interference strength, and may provide some new possibilities for technological applications.

关键词: electromagnetically induced transparency, phonon-assisted transition, semiconductor quantum dot

Abstract: The linear optical properties and Kerr nonlinear optical response in a four-level loop configuration GaAs/AlGaAs semiconductor quantum dot are analytically studied with the phonon-assisted transition (PAT). It is shown that the changes among a single electromagnetically induced transparency (EIT) window, a double EIT window and the amplification of the probe field in the absorption curves can be controlled by varying the strength of PAT κ. Meanwhile, double switching from the anomalous dispersion regime to the normal dispersion regime can likely be achieved by increasing the Rabi energy of the external optical control field. Furthermore, we demonstrate that the group velocity of the probe field can be practically regulated by varying the PAT and the intensity of the optical control field. In the nonlinear case, it is shown that the large SPM and XPM can be achieved as linear absorption vanishes simultaneously, and the PAT can suppress both third-order self-Kerr and the cross-Kerr nonlinear effect of the QD. Our study is much more practical than its atomic counterpart due to its flexible design and the controllable interference strength, and may provide some new possibilities for technological applications.

Key words: electromagnetically induced transparency, phonon-assisted transition, semiconductor quantum dot

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
78.67.De (Quantum wells)