Splitting of excitons and biexcitons in coupled InAs quantum dot molecules

被引：16
|
作者：
Xu, XL
Williams, DA
Cleaver, JRA
机构：
[1] Univ Cambridge, Cavendish Lab, Microelect Res Ctr, Cambridge CB3 0HE, England
[2] Univ Cambridge, Cavendish Lab, Hitachi Cambridge Lab, Cambridge CB3 0HE, England
来源：
APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 01期
关键词：
D O I：
10.1063/1.1842861
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Coupling in laterally coupled InAs quantum dot molecules has been observed by conventional microscopic photoluminescence spectroscopy. At low excitation intensity, splitting of exciton emission is observed, and this is ascribed to recombination of bonding and antibonding states when two quantum dots are coupled. With increasing excitation intensity, splitting of biexciton emission because of coupling is observed on both sides of the exciton peaks. The splitting of both exciton and biexciton peaks increases with increasing energy, which implies a large wave function overlap at high energy. (C) 2005 American Institute of Physics.
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页码：012103 / 1
页数：3
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