A spin-polarized bi-exciton in a semiconductor quantum dot

被引：2
|
作者：
Korkusinski, Marek [1 ]
Hawrylak, Pawel [1 ]
Potemski, Marek [2 ]
机构：
[1] Natl Res Council Canada, Inst Microstruct Sci, Quantum Theory Grp, Ottawa, ON K1A 0R6, Canada
[2] CNRS, Grenoble High Magnet Field Lab, Grenoble, France
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 45期
关键词：
D O I：
10.1088/0953-8984/20/45/454213
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We discuss the role of spin-polarized multi-exciton complexes in the emission spectra of semiconductor quantum dots. The spin-polarized bi-exciton complex composed of two spin-polarized electrons and two spin-polarized holes confined in a single, parabolic, self-assembled quantum dot is discussed in detail. The configuration-interaction approach is used to compute the energies, wavefunctions, and emission spectra as a function of the magnetic field. It is shown that the spin-polarized bi-exciton emission spectrum differs from the unpolarized spectrum due to the Pauli blocking and exchange interactions. The emission from spin-polarized bi-exciton allows for the measurement of ground and excited single-exciton states, and its magnetic field dependence allows for the differentiation of the spin-polarized bi-exciton and tri-exciton spectrum.
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页数：5
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