Coherent phonon manipulation in coupled mechanical resonators
Coherent phonon manipulation in coupled mechanical resonators
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DOI：
10.1038/nphys2665
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发表时间：
2013-08-01
期刊：
影响因子：
19.6
通讯作者：
Yamaguchi, Hiroshi
中科院分区：
文献类型：
--
作者：
Okamoto, Hajime;Gourgout, Adrien;Yamaguchi, Hiroshi
耦合纳米机械谐振器由于其敏感的交感振荡动力学特性，近年来在实际应用和基础研究方面都受到了广泛关注（1-10）。该体系结构进一步发展的一个挑战是耦合振荡的相干操纵。在这里，我们通过使用压电换能器周期性调制（泵送）应力，证明了两个gaas基机械谐振器之间的强动态耦合。这种强耦合使得声子居群在谐振器之间的相干转移成为可能，即声子拉比振荡（11-13）。动态耦合的性质也可以从线性一阶相互作用调整为非线性高阶过程，其中多个泵浦声子介导相干振荡（即多泵浦声子混合）。这种相干操作不仅对控制经典振荡有用（14），而且可以扩展到量子状态（11-13），开辟了纠缠两个不同的宏观机械物体的前景（15,16）。
Coupled nanomechanical resonators have recently attracted great attention for both practical applications and fundamental studies owing to their sensitive sympathetic oscillation dynamics(1-10). A challenge to the further development of this architecture is the coherent manipulation of the coupled oscillations. Here, we demonstrate strong dynamic coupling between two GaAs-based mechanical resonators by periodically modulating (pumping) the stress using a piezoelectric transducer. This strong coupling enables coherent transfer of phonon populations between the resonators, namely phonon Rabi oscillations(11-13). The nature of the dynamic coupling can also be tuned from a linear first-order interaction to a nonlinear higher-order process in which more than one pump phonon mediates the coherent oscillations (that is, multi-pump phonon mixing). This coherent manipulation is not only useful for controlling classical oscillations(14) but can also be extended to the quantum regime(11-13), opening up the prospect of entangling two distinct macroscopic mechanical objects(15,16).