Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 93, Issue 7, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0095614
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Funding
- JSPS KAKENHI [JP18KK0387]
- JST PRESTO [JPMJPR1909]
- UK's EPSRC [EP/N031105/1, EP/S000267/1]
- H2020-EU.1.2.1 TEQ Project [766900]
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This study demonstrates a camera-based feedback cooling scheme for controlling charged nanoparticles levitated in a linear Paul trap. The scheme utilizes real-time image processing and feedback signal transmission to the trap electrodes for cooling effects, and is applicable for controlling low-frequency mechanical oscillators.
Imaging-based detection of the motion of levitated nanoparticles complements a widely used interferometric detection method, providing a precise and robust way to estimate the position of the particle. Here, we demonstrate a camera-based feedback cooling scheme for a charged nanoparticle levitated in a linear Paul trap. The nanoparticle levitated in vacuum was imaged using a complementary metal-oxide semiconductor (CMOS) camera system. The images were processed in real-time 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 cooling by velocity damping. Our study provides a simple and versatile approach applicable for the control of low-frequency mechanical oscillators.
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