AI 中文总结
该研究实现了高纵横比硅纳米棒的光悬浮与控制，可调节其振荡频率、施加光扭矩，为精密扭矩传感及量子物理测试提供新平台。
AI 中文摘要
通过光、电或磁场悬浮的纳米和微颗粒是精密传感及基础物理测试的新前沿。对于光悬浮的各向异性颗粒，可控制其平移、取向和旋转。我们报道了纳米加工的高均匀度、高纵横比、高折射率硅圆柱的悬浮与表征，其直径低至50 nm，长度可达1500 nm。我们能够将它们的振荡频率调谐在10 kHz至超过1 MHz之间，并施加巨大的光扭矩以产生高旋转速率。这些光悬浮硅纳米棒将实现精密扭矩传感，当尺寸缩小至更小时，可通过角动量叠加态的产生用于量子物理测试。
英文摘要
Nano- and micro-particles levitated by optical, electrical or magnetic fields are a new frontier in precision sensing and for tests of fundamental physics. For optically levitated anisotropic particles it is possible to control their translation, alignment and rotation. We report on the levitation and characterization of nanofabricated, high uniformity, high aspect ratio, high refractive index silicon cylinders, with diameters as low as 50 nm and lengths up to 1500 nm. We are able to tune their oscillation frequencies from 10 kHz to over 1 MHz, and exert huge optical torque to generate high rotation rates. These optically levitated silicon nanorods will enable precision torque sensing, and when pushed to smaller sizes, tests of quantum physics through the generation of angular momentum superposition states.
