Polarization spectroscopy of charged single self-assembled quantum dots

被引：0
|
作者：
Ware, ME [1 ]
Bracker, A [1 ]
Gammon, D [1 ]
Gershoni, D [1 ]
机构：
[1] USN, Res Lab, Washington, DC 20375 USA
来源：
SELF-ORGANIZED PROCESSES IN SEMICONDUCTOR HETEROEPITAXY | 2004年 / 794卷
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have demonstrated single dot spectroscopy of InAs/GaAs self-assembled quantum dots embedded in a bias controlled Schottky diode. The photoluminescence spectra exhibit discrete lines depending on bias, which we attribute to the recombination of positively charged, neutral, and negatively charged confined excitons. With excitation directly into the dot, large circular polarization memory is exhibited by the two charged exciton (trion) lines. This indicates long spin lifetimes for both the electron and the heavy hole in the quantum dots.
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页码：139 / 144
页数：6
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