Optical binding of two cooled micro-gyroscopes levitated in vacuum
Optical binding of two cooled micro-gyroscopes levitated in vacuum
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DOI：
10.1364/optica.5.000910
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发表时间：
2018-08-20
期刊：
影响因子：
10.4
通讯作者：
Dholakia, Kishan
中科院分区：
文献类型：
--
作者：
Arita, Yoshihiko;Wright, Ewan M.;Dholakia, Kishan
真空中悬浮的介观粒子之间的耦合是实现欠阻尼环境中大规模粒子阵列以及经典-量子界面上的潜在研究的先决条件。在这里，我们证明了第一次，尽我们所知，在真空中的光散射介导的两个旋转微粒之间的光学结合。我们研究了两个正常振荡模式之间的自相关性，这两个正常振荡模式由两个粒子系统的质心和相对位置决定。粒子间的耦合，作为一个结果的光学绑定，消除简并的正常模式的频率，这是在良好的协议与理论。我们进一步证明了旋转微粒的光学约束阵列在陀螺冷却过程中保持其光学耦合，并表现出合作运动的质心是稳定的。
Coupling between mesoscopic particles levitated in vacuum is a prerequisite for the realization of a large-scale array of particles in an underdamped environment as well as potential studies at the classical - quantum interface. Here, we demonstrate for the first time, to the best of our knowledge, optical binding between two rotating microparticles mediated by light scattering in vacuum. We investigate autocorrelations between the two normal modes of oscillation determined by the center-of-mass and the relative positions of the two-particle system. The inter-particle coupling, as a consequence of optical binding, removes the degeneracy of the normal mode frequencies, which is in good agreement with theory. We further demonstrate that the optically bound array of rotating microparticles retains their optical coupling during gyroscopic cooling, and exhibits cooperative motion whose center-of-mass is stabilized.