Imaging-based feedback cooling of a levitated nanoparticle

Year: 2022

Authors: Minowa Y., Kato K., Ueno S., Penny T.W., Pontin A., Ashida M., Barker P.F.

Autors Affiliation: Osaka Univ, Grad Sch Engn Sci, 1-3 Machikaneyama Cho, Toyonaka, Osaka 5608531, Japan; UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England.

Abstract: 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.

Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS

Volume: 93 (7)      Pages from: 75109-1  to: 75109-5

More Information: Y.M. acknowledges funding from the JSPS KAKENHI under Grant No. JP18KK0387 and JST PRESTO under Grant No. JPMJPR1909. P.F.B. acknowledges support from the UK’s EPSRC under Grant Nos. EP/N031105/1 and EP/S000267/1 and the H2020-EU.1.2.1 TEQ Project under Grant Agreement ID 766900.
KeyWords: Cameras; CMOS integrated circuits; Cooling; Feedback; Metal nanoparticles; MOS devices; Oscillistors; Oxide semiconductors
DOI: 10.1063/5.0095614