arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.0913cond-mat.mes-hall
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单个量子点的声子辅助population inversion

Phonon-assisted population inversion of a single quantum dot

J. H. Quilter, A. J. Brash, F. Liu, M. Glässl, A. M. Barth, V. M. Axt, A. J. Ramsay, M. S. Skolnick, A. M. Fox

摘要:

我们提出了一种实现单个InGaAs/GaAs量子点布居数反转的方法,该方法由中性激子声子边带内调谐的激光脉冲驱动。反转是通过声子辅助弛豫的光学修饰态的快速热化来实现的。一个最大的激子人口为0.67 $\pm$ 0.06的测量为0.83毫电子伏的激光调谐到更高的能量和声子边带映射使用双色泵浦探测技术。我们的实验表明,根据理论,声子浴提供了额外的功能,光学驱动的量子点量子比特。

英文摘要:

We demonstrate an approach to realize the population inversion of a single InGaAs/GaAs quantum dot, which is driven by a laser pulse tuned within the neutral exciton phonon sideband. The inversion is achieved by rapid thermalization of the optically dressed states via phonon-assisted relaxation. A maximum exciton population of 0.67 $\pm$ 0.06 is measured for a laser tuned 0.83 meV to higher energy and the phonon sideband is mapped using a two-color pump-probe technique. Our experiments reveal that, in accordance with theory, the phonon-bath provides additional functionality for an optically driven quantum dot qubit.

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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