中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2258-2263.doi: 10.1088/1674-1056/18/6/025

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Size dependence of biexciton binding energy in single InAs/GaAs quantum dots

贾锐1, 牛智川2, 杨富华2, 窦秀明3, 孙宝权3, 黄社松3, 倪海桥3   

  1. (1)Laboratory of Nano-Fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China; (2)SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (3)SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2008-06-27 修回日期:2008-11-27 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundations of China (Grant Nos O69C041001 and 2007CB924904).

Size dependence of biexciton binding energy in single InAs/GaAs quantum dots

Dou Xiu-Ming(窦秀明)a), Sun Bao-Quan(孙宝权)a)†, Huang She-Song(黄社松)a), Ni Hai-Qiao(倪海桥)a), Niu Zhi-Chuan(牛智川)a), Yang Fu-Hua(杨富华)a), and Jia Rui(贾锐)b)   

  1. a SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; b Laboratory of Nano-Fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
  • Received:2008-06-27 Revised:2008-11-27 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by the National Natural Science Foundations of China (Grant Nos O69C041001 and 2007CB924904).

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摘要： This paper studies the size dependence of biexciton binding energy in single quantum dots (QDs) by using atomic force microscopy and micro-photoluminescence measurements. It finds that the biexciton binding energies in the QDs show ``binding'' and ``antibinding'' properties which correspond to the large and small sizes of QDs, respectively. The experimental results can be well interpreted by the biexciton potential curve, calculated from the exciton molecular model and the Heitler--London method.

关键词: biexcition binding energy, single quantum dots, exciton molecular model, Heitler--London method

Abstract: This paper studies the size dependence of biexciton binding energy in single quantum dots (QDs) by using atomic force microscopy and micro-photoluminescence measurements. It finds that the biexciton binding energies in the QDs show ``binding'' and ``antibinding'' properties which correspond to the large and small sizes of QDs, respectively. The experimental results can be well interpreted by the biexciton potential curve, calculated from the exciton molecular model and the Heitler--London method.

Key words: biexcition binding energy, single quantum dots, exciton molecular model, Heitler--London method

中图分类号:  (Quantum dots)

  • 73.21.La
68.37.Ps (Atomic force microscopy (AFM)) 71.35.-y (Excitons and related phenomena) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.55.Cr (III-V semiconductors) 78.67.Hc (Quantum dots)