Cooling the optical-spin driven limit cycle oscillations of a levitated gyroscope
Cooling the optical-spin driven limit cycle oscillations of a levitated gyroscope
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冷却悬浮陀螺仪的光学自旋驱动的极限环振荡
DOI：
10.1038/s42005-023-01336-4
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发表时间：
2023
影响因子：
5.5
通讯作者：
Arita Y
中科院分区：
文献类型：
--
作者：
Arita Y
双折射微球，被困在真空中并被圆偏振光旋转，表现出非常稳定的平移运动。这与类似条件下的各向同性颗粒形成鲜明对比。在这里，我们证明了这种稳定性，因为这些双折射球的快速旋转减少了由圆偏振光的非均匀光学自旋产生的方位角自旋力的影响。在降低的压力下，这些旋转平均的，有效的方位角力的独特的配置文件的结果在纳米尺度的极限环的形成。我们证明了这些非平衡振荡器的反馈冷却，导致有效温度的顺序毫开尔文。我们在这里详细阐述的原则可以通知承载增强向心载荷的高稳定性转子的设计，或者导致更有效的冷却方案，用于自主极限环振荡。最终，后者的发展可以提供实验访问非平衡量子效应在介观制度。
Birefringent microspheres, trapped in vacuum and set into rotation by circularly polarised light, demonstrate remarkably stable translational motion. This is in marked contrast to isotropic particles in similar conditions. Here we demonstrate that this stability is obtained because the fast rotation of these birefringent spheres reduces the effect of azimuthal spin forces created by the inhomogeneous optical spin of circularly polarised light. At reduced pressures, the unique profile of these rotationally averaged, effective azimuthal forces results in the formation of nano-scale limit cycles. We demonstrate feedback cooling of these non-equilibrium oscillators, resulting in effective temperatures on the order of a milliKelvin. The principles we elaborate here can inform the design of high-stability rotors carrying enhanced centripetal loads or result in more efficient cooling schemes for autonomous limit cycle oscillations. Ultimately, this latter development could provide experimental access to non-equilibrium quantum effects within the mesoscopic regime.
影响因子：
13.6
作者：
M. Schuck;D. Steinert;T. Nussbaumer;J. Kolar
通讯作者：
J. Kolar