Coupling mechanical motion of a single atom to a micromechanical cantilever

Coupling mechanical motion of a single atom to a micromechanical cantilever
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将单个原子的机械运动耦合到微机械悬臂梁

DOI:
10.1364/oe.25.032931
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发表时间:
2017-12
期刊:
影响因子:
3.8
通讯作者:
Yueheng Lan 兰岳恒
Yueheng Lan 兰岳恒
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wenjie Nie 聂文杰;Aixi Chen 陈爱喜;Yueheng Lan 兰岳恒

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我们设计并分析了一种混合光机装置来实现微机械悬臂梁的机械运动与囚禁在腔内的单个原子之间的有效耦合,这种耦合是通过量子真空效应使微机械悬臂梁与原子内态之间的直接相互作用实现的。此外,悬臂梁的机械运动与腔场之间的光机耦合可以通过与原子的相互作用来调节。通过分析机械运动的简正模分裂和混合光机系统的光学响应,详细地说明了它们之间的耦合。研究发现,在存在中介耦合的情况下,在输出探测场中可以观察到双光机械诱导的透明。特别是,分裂峰的宽度和两个吸收峰之间的间隔都随着真空耦合强度的增加和原子俘获位置的减小而增加。这些特性可以用来研究单个原子与大质量微机械悬臂梁之间的强耦合。
We design and analyze a hybrid optomechanical setup to achieve an effective coupling between the mechanical motions of a micromechanical cantilever and a single atom trapped inside a cavity, which is mediated by a direct interaction between the micromechanical cantilever and the atomic internal state via the quantum vacuum effect. Moreover, the optomechanical coupling between the mechanical motion of the cantilever and the cavity field can be mediated by the interaction with the atom. Their couplings are demonstrated in detail by analyzing the normal-mode splitting of the mechanical motion and the optical response of the hybrid optomechanical system. It is found that double optomechanically-induced transparency can be observed in the output probe field in the presence of the mediated coupling. In particular, both the width of the splitting peaks and the separation between the two absorption dips increase with the increasing strength of the vacuum coupling and with the decreasing trapped position of the atom. These characteristics can be used to study the strong coupling between a single atom and a massive micromechanical cantilever.
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