论文标题
基于成像的反馈冷却悬浮的纳米颗粒
Imaging based feedback cooling of a levitated nanoparticle
论文作者
论文摘要
基于成像的悬浮纳米颗粒运动的检测补充了一种广泛使用的干涉检测方法，提供了一种精确且可靠的方法来估计粒子的位置。在这里，我们显示了基于相机的反馈冷却，该反馈冷却在线性保罗陷阱中悬浮的带电纳米颗粒。 CMOS摄像头系统观察到在真空中悬浮的带电纳米颗粒。用与CMOS图像传感器集成的微控制器实时处理纳米颗粒图像。相延迟的位置信号被喂入陷阱电极之一，导致速度阻尼冷却。我们的研究提供了一种简单且通用的方法，可用于控制低频机械振荡器。
Imaging-based detection of the motion of the levitated nanoparticles complements a widely-used interferometric detection method, providing a precise and robust way to estimate the position of the particle. Here, we show the camera-based feedback cooling of a charged nanoparticle levitated in a linear Paul trap. A charged nanoparticle levitated in a vacuum was observed by CMOS camera systems. The nanoparticle images were processed in realtime with a microcontroller integrated with a CMOS image sensor. The phase-delayed position signal was fed-back to one of the trap electrodes resulting in the velocity damping cooling. Our study provides a simple and versatile approach applicable for control of low-frequency mechanical oscillators.
