中国物理B ›› 2016, Vol. 25 ›› Issue (10): 107804-107804.doi: 10.1088/1674-1056/25/10/107804

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

Polaron effect on the optical rectification in spherical quantum dots with electric field

Zhen-Yu Feng(冯振宇), Zu-Wei Yan(闫祖威)   

  1. 1 School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;
    2 College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
  • 收稿日期:2016-02-27 修回日期:2016-05-30 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Zu-Wei Yan E-mail:zwyan101@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11364028), the Major Projects of the Natural Science Foundation of Inner Mongolia Autonomous Region, China (Grant No. 2013ZD02), and the Project of “Prairie Excellent” Engineering in Inner Mongolia Autonomous Region, China.

Polaron effect on the optical rectification in spherical quantum dots with electric field

Zhen-Yu Feng(冯振宇)1, Zu-Wei Yan(闫祖威)1,2   

  1. 1 School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;
    2 College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2016-02-27 Revised:2016-05-30 Online:2016-10-05 Published:2016-10-05
  • Contact: Zu-Wei Yan E-mail:zwyan101@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11364028), the Major Projects of the Natural Science Foundation of Inner Mongolia Autonomous Region, China (Grant No. 2013ZD02), and the Project of “Prairie Excellent” Engineering in Inner Mongolia Autonomous Region, China.

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摘要： The polaron effect on the optical rectification in spherical quantum dots with a shallow hydrogenic impurity in the presence of electric field is theoretically investigated by taking into account the interactions of the electrons with both confined and surface optical phonons. Besides, the interaction between impurity and phonons is also considered. Numerical calculations are presented for typical Zn1-xCdxSe/ZnSe material. It is found that the polaronic effect or electric field leads to the redshifted resonant peaks of the optical rectification coefficients. It is also found that the peak values of the optical rectification coefficients with the polaronic effect are larger than without the polaronic effect, especially for smaller Cd concentrations or stronger electric field.

关键词: polaron effect, optical rectification, spherical quantum dot

Abstract: The polaron effect on the optical rectification in spherical quantum dots with a shallow hydrogenic impurity in the presence of electric field is theoretically investigated by taking into account the interactions of the electrons with both confined and surface optical phonons. Besides, the interaction between impurity and phonons is also considered. Numerical calculations are presented for typical Zn1-xCdxSe/ZnSe material. It is found that the polaronic effect or electric field leads to the redshifted resonant peaks of the optical rectification coefficients. It is also found that the peak values of the optical rectification coefficients with the polaronic effect are larger than without the polaronic effect, especially for smaller Cd concentrations or stronger electric field.

Key words: polaron effect, optical rectification, spherical quantum dot

中图分类号:  (Quantum dots)

  • 78.67.Hc
73.21.La (Quantum dots) 71.38.-k (Polarons and electron-phonon interactions)