Optical pulling forces on Rayleigh particles using ambient optical nonlinearity

Nanophotonics

article

Liping Gong¹  Xiaohe Zhang¹  Bing Gu¹  Zhuqing Zhu²  Guanghao Rui¹  Jun He³  Qiwen Zhan⁴  Yiping Cui¹ 

[1] Advanced Photonics Center, Southeast University;Key Laboratory of Optoelectronic Technology of Jiangsu Province, School of Physical Science and Technology, Nanjing Normal University;School of Physics and Electronics, Central South University;Department of Electro-Optics and Photonics, University of Dayton, 300 College Park;School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology

关键词: pulling force;    laser trapping;    nonlinear optical effect;    two-photon absorption;    femtosecond laser pulses;   

DOI  :  10.1515/nanoph-2019-0095

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Optical pulling forces exerted on small particles can be achieved by tailoring the properties of the electromagnetic field, the particles themselves, or the surrounding environment. However, the nonlinear optical effect of the surrounding environment has been largely neglected. Herein, we report the optical pulling forces on a Rayleigh particle immersed in a nonlinear optical liquid using high-repetition-rate femtosecond laser pulses. The analytic expression of time-averaged optical forces allows us to better understand the underlying mechanism of the particle transportation. It is shown that the two-photon absorption of the surrounding liquid gives rise to a negative radiation force. Transversely confined Rayleigh particles can be continuously dragged towards the light source during a pulling process.

【 授权许可】

CC BY