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arXiv · 2204.05506

Imaging based feedback cooling of a levitated nanoparticle

Yosuke Minowa·Keisuke Kato·Shoki Ueno·Thomas W. Penny·Antonio Pontin·Masaaki Ashida·Peter F. Barker
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Abstract

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.

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Yosuke Minowa, Keisuke Kato, Shoki Ueno, Thomas W. Penny, Antonio Pontin, Masaaki Ashida, Peter F. Barker. 2022-04-12. Imaging based feedback cooling of a levitated nanoparticle. https://doi.org/10.1063/5.0095614

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