Super-resolution imaging of a low frequency levitated oscillator.
Super-resolution imaging of a low frequency levitated oscillator.
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低频悬浮振荡器的超分辨率成像。
DOI：
10.1063/1.5108807
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
P. Barker
中科院分区：
文献类型：
--
作者：
N. P. Bullier;A. Pontin;P. Barker
我们描述了使用CMOS相机对保罗阱中悬浮纳米粒子的长期运动的测量。这种简单的方法使我们能够达到高达106的信噪比，位移灵敏度优于10⁻¹⁶ m²/Hz。该方法可用于提取阱参数以及悬浮粒子的特性。我们展示了在数周时间尺度上对粒子动力学的连续监测。我们表明，通过使用超分辨率成像带来的改进，可以显著降低噪声基底，同时提高力灵敏度的带宽。对于一系列需要低光功率的低频振荡器，这种方法是标准光学检测的一种有竞争力的替代方案。
We describe the measurement of the secular motion of a levitated nanoparticle in a Paul trap with a CMOS camera. This simple method enables us to reach signal-to-noise ratios as good as 106 with a displacement sensitivity better than 10-16 m2/Hz. This method can be used to extract trap parameters as well as the properties of the levitated particles. We demonstrate continuous monitoring of the particle dynamics on time scales of the order of weeks. We show that by using the improvement given by super-resolution imaging, a significant reduction in the noise floor can be attained, with an increase in the bandwidth of the force sensitivity. This approach represents a competitive alternative to standard optical detection for a range of low frequency oscillators where low optical powers are required.