Ultrasensitive optical-tweezer torque detection and Casimir effects

Tongcang Li

doi:10.1117/12.2586802

5 March 2021 Ultrasensitive optical-tweezer torque detection and Casimir effects

Tongcang Li

Proceedings Volume 11700, Optical and Quantum Sensing and Precision Metrology; 1170013 (2021) https://doi.org/10.1117/12.2586802
Event: SPIE OPTO, 2021, Online Only

Abstract

Recently, we optically levitated nanoparticles in vacuum and driven them to rotate up to 300 billion rpm (5 GHz) [J. Ahn, et al. Nature Nanotechnology 15, 89 (2020)]. We demonstrated ultrasensitive torque detection with an optically levitated nanoparticle in vacuum. This system will be promising to study quantum friction and other Casimir effects. We also calculated the vacuum frictional torque on a barium strontium titanate (BST) nanosphere near a BST surface, and found the vacuum friction can be enhanced by several orders with resonant photon tunneling.

Conference Presentation

Citation Download Citation

Tongcang Li "Ultrasensitive optical-tweezer torque detection and Casimir effects", Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 1170013 (5 March 2021); https://doi.org/10.1117/12.2586802

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