Observation of intershell and hybridized energy states in InAs/GaAs quantum dots

被引：4
|
作者：
Wang, FZ [1 ]
Chen, ZH
Bai, LH
Huang, SH
Xiong, H
Shen, SC
Sun, J
Jin, P
Wang, ZG
机构：
[1] Fudan Univ, Dept Phys, Surface Phys Lab, Shanghai 200433, Peoples R China
[2] Acad Sinica, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 09期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2034104
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the evolution of exciton state filling as a function of excitation power density in InAs/GaAs quantum dots (QDs). In addition to the emission bands of exciton recombination corresponding to the atom-like S, P, and D, etc. shells of quantum dots, it was observed that some extra states, P-' (between the S and P shells) and D-' (between the P and D shells), appear in the spectra with increasing number of excitons occupying the QDs. The emergence of these intershell excitonic levels is an experimental demonstration of strong exciton-exciton exchange interaction and coupling as well as state mixing and hybridization of a multiexciton system in quantum dots.
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页数：3
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