Probing excitons and biexcitons in coupled quantum dots by coherent two-dimensional optical spectroscopy

被引：7
|
作者：
Kavousanaki, E. G. [1 ]
Roslyak, O. [1 ]
Mukamel, S. [1 ]
机构：
[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92617 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 15期
基金：
美国国家科学基金会;
关键词：
biexcitons; gallium arsenide; hopping conduction; III-V semiconductors; indium compounds; infrared spectra; photon echo; semiconductor quantum dots; ultraviolet spectra; visible spectra; SEMICONDUCTOR NANOCRYSTALS; SYSTEMS; INFORMATION;
D O I：
10.1103/PhysRevB.79.155324
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We calculate two-dimensional (2D) photon-echo and double-quantum-coherence spectra of two coupled InGaAs/GaAs quantum dots at various distances, taking into account electron, hole, and exciton hopping. Signatures of direct and indirect excitons in two-exciton resonances are revealed. At short distances, electron delocalization contributes to the creation of new biexcitonic peaks, and dipole-dipole interactions shift the two-exciton energies.
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页数：10
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