Measuring static femto-Newton optical forces by a nanofiber with white-light interferometry

Yu Zhang; Jianhui Yu; Wenguo Zhu; Huadan Zheng; Huihui Lu; Jieyuan Tang; Yi Xiao; Yongchun Zhong; Yunhan Luo; Jun Zhang; Zhe Chen

doi:10.1117/12.2520367

14 February 2019 Measuring static femto-Newton optical forces by a nanofiber with white-light interferometry

Yu Zhang, Jianhui Yu, Wenguo Zhu, Huadan Zheng, Huihui Lu, Jieyuan Tang, Yi Xiao, Yongchun Zhong, Yunhan Luo, Jun Zhang, Zhe Chen

Author Affiliations +

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 1104843 (2019) https://doi.org/10.1117/12.2520367
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

By now, it is still extremely challenging to accurately measure femto-Newton (10^-15 N) optical forces. Here, a simple scheme of a suspended tapered nanofiber coupled with a glass substrate is demonstrated to generate and sense the fN optical force, where the ~10 nm deformation of the nanofiber can be resolved by white light interferometry and an ultra-low stiffness of 0.540 fN/nm is obtained for the suspended nanofiber through Brownian motion. Owing to the ultra-low stiffness of the nanofiber, the scheme provides a cost-effective method to sense and measure ultra-weak (5.2 fN) optical force. Moreover, the scheme also provides a simple way to exploit fN optical forces for implementation of micro-Watt all-optical devices.

Citation Download Citation

Yu Zhang, Jianhui Yu, Wenguo Zhu, Huadan Zheng, Huihui Lu, Jieyuan Tang, Yi Xiao, Yongchun Zhong, Yunhan Luo, Jun Zhang, and Zhe Chen "Measuring static femto-Newton optical forces by a nanofiber with white-light interferometry", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 1104843 (14 February 2019); https://doi.org/10.1117/12.2520367

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