Chin. Phys. Lett.  2003, Vol. 20 Issue (7): 1120-1123    DOI:
Original Articles |
Optical Spectra and Exciton State in Vertically Stacked Self-Assembled Quantum Disks
LIU Jin-Long;LI Shu-Shen;NIU Zhi-Chuan;YANG Fu-Hua;FENG Song-Lin
State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083
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LIU Jin-Long, LI Shu-Shen, NIU Zhi-Chuan et al  2003 Chin. Phys. Lett. 20 1120-1123
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Abstract We study the oscillator strengths of the optical transitions of the vertically stacked self-assembled InAs quantum disks. The oscillator strengths change evidently when the two quantum disks are far apart from each other. A vertically applied electric field affects the oscillator strengths severely, while the oscillator strengths change slowly as the radius of one disk increases. We also studied the excitonic energy of the system, including the Coulomb interaction. The excitonic energy increases with the increasing radius of one disk, but decreases as a vertically applied electric field increases.
Keywords: 71.35.Cc      73.21.La     
Published: 01 July 2003
PACS:  71.35.Cc (Intrinsic properties of excitons; optical absorption spectra)  
  73.21.La (Quantum dots)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I7/01120
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LIU Jin-Long
LI Shu-Shen
NIU Zhi-Chuan
YANG Fu-Hua
FENG Song-Lin
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