Coherent mixing of mechanical excitations in nano-optomechanical structures
Coherent mixing of mechanical excitations in nano-optomechanical structures
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DOI：
10.1038/nphoton.2010.5
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发表时间：
2010-04-01
期刊：
影响因子：
35
通讯作者：
Painter, Oskar
中科院分区：
文献类型：
--
作者：
Lin, Qiang;Rosenberg, Jessie;Painter, Oskar
在纳米腔光机械系统中，可实现的大的每光子光力和小的运动质量的组合导致机械运动和腔光场之间的强动力学反作用。在这篇文章中，我们研究了两种不同的纳米腔结构，拉链纳米梁光子晶体腔和双微盘回音壁谐振腔中的机械运动的光学控制。这些空腔内的强光学梯度力被示出为引入显着的光学刚度的结构，与穿着机械状态重整成光学明亮和光学黑暗的运动模式。随着机械模式之间的内部机械耦合的增加，一种形式的光学控制的机械透明性被证明类似于三能级原子介质的电磁感应透明性。基于这些测量，相干传输的射频/微波信号之间的光场和一个长寿命的黑暗的机械状态的建议进行说明。
The combination of the large per-photon optical force and small motional mass achievable in nanocavity optomechanical systems results in strong dynamical back-action between mechanical motion and the cavity light field. In this Article, we study the optical control of mechanical motion within two different nanocavity structures, a zipper nanobeam photonic crystal cavity and a double-microdisk whispering-gallery resonator. The strong optical gradient force within these cavities is shown to introduce significant optical rigidity into the structure, with the dressed mechanical states renormalized into optically bright and optically dark modes of motion. With the addition of internal mechanical coupling between mechanical modes, a form of optically controlled mechanical transparency is demonstrated in analogy to electromagnetically induced transparency of three-level atomic media. Based upon these measurements, a proposal for coherently transferring radio-frequency/microwave signals between the optical field and a long-lived dark mechanical state is described.