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Open AccessArticle

Polarization-Dependent Lateral Optical Force of Subwavelength-Diameter Optical Fibers

by Xiangke Wang 1,†, Wanling Wu 1,†, Yipeng Lun 1, Huakang Yu 1,2,*, Qihua Xiong 2,3 and Zhi-yuan Li 1,2
1
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China
2
Sino-Singapore International Joint Research Institute, Guangzhou Knowledge City, Guangzhou 510663, China
3
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
These authors contributed equally to the manuscript.
Micromachines 2019, 10(10), 630; https://doi.org/10.3390/mi10100630
Received: 21 August 2019 / Revised: 16 September 2019 / Accepted: 20 September 2019 / Published: 21 September 2019
(This article belongs to the Special Issue IMCO 2019)
It is highly desirable to design optical devices with diverse optomechanical functions. Here, we investigate lateral optical force exerted on subwavelength-diameter (SD) optical fibers harnessed by input light modes with different polarizations. It is interesting to find that input light modes of circular or elliptical polarizations would bring about lateral optical force in new directions, which has not been observed in previous studies. By means of finite-difference time-domain (FDTD) simulations, detailed spatial distributions of the asymmetric transverse force density are revealed, meanwhile dependence of optical force on input light polarizations, fiber diameters, and inclination angles of fiber endfaces are all carefully discussed. It is believed that polarization-sensitive reflection, refraction, and diffraction of optical fields occur at the interface, i.e., fiber oblique endfaces, resulting in asymmetrically distributed optical fields and thereafter non-zero transverse optical force. We believe our new findings could be helpful for constructing future steerable optomechanical devices with more flexibility. View Full-Text
Keywords: optical force; subwavelength-diameter optical fiber; circular polarization; elliptical polarization optical force; subwavelength-diameter optical fiber; circular polarization; elliptical polarization
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MDPI and ACS Style

Wang, X.; Wu, W.; Lun, Y.; Yu, H.; Xiong, Q.; Li, Z.-Y. Polarization-Dependent Lateral Optical Force of Subwavelength-Diameter Optical Fibers. Micromachines 2019, 10, 630.

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