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arXiv 1404.3103cond-mat.mes-hallphysics.opticsquant-ph
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单根纳米线量子点的射频占据态控制

Radio frequency occupancy state control of a single nanowire quantum dot

Matthias Weiß, Florian J. R. Schülein, Jörg B. Kinzel, Michael Heigl, Daniel Rudolph, Max Bichler, Gerhard Abstreiter, Jonathan J. Finley, Achim Wixforth, Grego… 展开作者

Matthias Weiß, Florian J. R. Schülein, Jörg B. Kinzel, Michael Heigl, Daniel Rudolph, Max Bichler, Gerhard Abstreiter, Jonathan J. Finley, Achim Wixforth, Gregor Koblmüller, Hubert J. Krenner

摘要:

利用表面声波对单个异质结构量子点的激子占据态进行动态编程。量子点由嵌入GaAs-AlGaAs核-壳纳米线的AlGaAs壳中的GaAs QW的界面或厚度波动形成。当我们调整载流子在声学周期中光生的时间时,我们发现中性和带负电荷的激子的明显强度振荡。在高的声功率水平下,这些振荡变得与噪声相关,这使得能够对点的电荷配置、发射强度和发射波长进行直接声学编程。数值模拟证实,所观察到的调制产生的电子和电子空穴对浓度的量子点的位置从声学控制的调制。

英文摘要:

The excitonic occupancy state of a single, nanowire-based, heterostructure quantum dot is dynamically programmed by a surface acoustic wave. The quantum dot is formed by an interface or thickness fluctuation of a GaAs QW embedded in a AlGaAs shell of a GaAs-AlGaAs core-shell nanowire. As we tune the time at which carriers are photogenerated during the acoustic cycle, we find pronounced intensity oscillations of neutral and negatively charged excitons. At high acoustic power levels these oscillations become anticorrelated which enables direct acoustic programming of the dot's charge configuration, emission intensity and emission wavelength. Numerical simulations confirm that the observed modulations arise from acoustically controlled modulations of the electron and electron-hole-pair concentrations at the position of the quantum dot.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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