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Measuring static femto-Newton optical forces by a nanofiber with white-light interferometry
Author(s): Yu Zhang; Jianhui Yu; Wenguo Zhu; Huadan Zheng; Huihui Lu; Jieyuan Tang; Yi Xiao; Yongchun Zhong; Yunhan Luo; Jun Zhang; Zhe Chen
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Paper 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.

Paper Details

Date Published: 14 February 2019
PDF: 5 pages
Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 1104843 (14 February 2019); doi: 10.1117/12.2520367
Show Author Affiliations
Yu Zhang, Jinan Univ. (China)
Jianhui Yu, Jinan Univ. (China)
Wenguo Zhu, Jinan Univ. (China)
Huadan Zheng, Jinan Univ. (China)
Huihui Lu, Jinan Univ. (China)
Jieyuan Tang, Jinan Univ. (China)
Yi Xiao, Jinan Univ. (China)
Yongchun Zhong, Jinan Univ. (China)
Yunhan Luo, Jinan Univ. (China)
Jun Zhang, Jinan Univ. (China)
Zhe Chen, Jinan Univ. (China)


Published in SPIE Proceedings Vol. 11048:
17th International Conference on Optical Communications and Networks (ICOCN2018)
Zhaohui Li, Editor(s)

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