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arXiv 1306.4209cond-mat.mes-hall
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量子点-机械振子混合系统中的应变介导耦合

Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system

Inah Yeo, Pierre-Louis de Assis, Arnaud Gloppe, Eva Dupont-Ferrier, Pierre Verlot, Nitin S. Malik, Emmanuel Dupuy, Julien Claudon, Jean-Michel Gérard, Alexia Au… 展开作者

Inah Yeo, Pierre-Louis de Assis, Arnaud Gloppe, Eva Dupont-Ferrier, Pierre Verlot, Nitin S. Malik, Emmanuel Dupuy, Julien Claudon, Jean-Michel Gérard, Alexia Auffèves, Gilles Nogues, Signes Seidelin, Jean-Philippe Poizat, Olivier Arcizet, Maxime Richard

摘要:

纳米技术的最新进展已经允许制造新的混合系统,其中单个两级系统耦合到机械纳米谐振器。在这样的系统中,宏观自由度的量子性质可以被揭示和操纵。这为量子信息技术和量子-经典边界的探索开辟了诱人的前景。在这里,我们提出了实验实现的单片固态混合系统的材料应变:一个量子点嵌入在纳米线具有离散的机械共振对应的弯曲振动模式。机械振动导致调制量子点跃迁能量的时变应变场。这种方法同时提供了大的光提取效率和大的激子-声子耦合强度$g_0$。通过光学和机械光谱,我们发现,$g_0/2π$是几乎一样大的机械频率,一个标准,定义的超强耦合制度。

英文摘要:

Recent progress in nanotechnology has allowed to fabricate new hybrid systems where a single two-level system is coupled to a mechanical nanoresonator. In such systems the quantum nature of a macroscopic degree of freedom can be revealed and manipulated. This opens up appealing perspectives for quantum information technologies, and for the exploration of quantum-classical boundary. Here we present the experimental realization of a monolithic solid-state hybrid system governed by material strain: a quantum dot is embedded within a nanowire featuring discrete mechanical resonances corresponding to flexural vibration modes. Mechanical vibrations result in a time-varying strain field that modulates the quantum dot transition energy. This approach simultaneously offers a large light extraction efficiency and a large exciton-phonon coupling strength $g_0$. By means of optical and mechanical spectroscopy, we find that $g_0/2π$ is nearly as large as the mechanical frequency, a criterion which defines the ultra-strong coupling regime.

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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