GHz rotation and sensing with an optically levitated nanodumbbell near a surface

Peng Ju; Yuanbin Jin; Kunhong Shen; Yao Duan; Zhujing Xu; Xingyu Gao; Alejandro J. Grine; Xinjie Ni; Tongcang Li

doi:10.1117/12.2676898

5 October 2023 GHz rotation and sensing with an optically levitated nanodumbbell near a surface

Peng Ju, Yuanbin Jin, Kunhong Shen, Yao Duan, Zhujing Xu, Xingyu Gao, Alejandro J. Grine, Xinjie Ni, Tongcang Li

Author Affiliations +

Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126490M (2023) https://doi.org/10.1117/12.2676898
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

A levitated non-spherical nanoparticle in a vacuum is ideal for studying quantum rotations and is an extremely sensitive torque and force detector. Here, we report optical levitation of a GHz rotating silica nanodumbbell in a vacuum at about 430 nm away from a sapphire surface. The rotating nanodumbbell near the surface demonstrate a torque sensitivity of (5.0 ± 1.1) × 10^(-26) NmHz^(−1/2) at room temperature. Moreover, we levitate a nanodumbbell near a gold nanograting and use it to probe the near-field intensity distribution beyond the optical diffraction limit. The system is promising to detect the Casimir torque.

Conference Presentation

Citation Download Citation

Peng Ju, Yuanbin Jin, Kunhong Shen, Yao Duan, Zhujing Xu, Xingyu Gao, Alejandro J. Grine, Xinjie Ni, and Tongcang Li "GHz rotation and sensing with an optically levitated nanodumbbell near a surface", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126490M (5 October 2023); https://doi.org/10.1117/12.2676898

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