5D cooling and torque detection with optically levitated nanoparticles

Tongcang Li

doi:10.1117/12.2595487

1 August 2021 5D cooling and torque detection with optically levitated nanoparticles

Tongcang Li

Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 1179816 (2021) https://doi.org/10.1117/12.2595487
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

An optically levitated nonspherical particle in a vacuum is great for torque sensing and rotational quantum mechanics. Recently, we optically levitated silica nanodumbbells in a vacuum and drove them to rotate beyond 5 GHz. With an optically levitated nanorotor, we demonstrated a torque sensor with a record-high sensitivity [Nature Nanotechnology, 15, 89 (2020)]. Such an ultrasensitive torque sensor will have the potential to detect the long-sought quantum vacuum friction. We also demonstrated 5D cooling and observed nonlinear dynamics of an optically levitated nanodumbbell in a vacuum. This work is an important step towards full quantum control of the rigid-body motion of a levitated nonspherical particle.

Conference Presentation

Citation Download Citation

Tongcang Li "5D cooling and torque detection with optically levitated nanoparticles", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 1179816 (1 August 2021); https://doi.org/10.1117/12.2595487

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