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Lorentz force and the optical pulling of multiple rayleigh particles outside the dielectric cylindrical waveguides
Author(s) -
Mahdy M.R.C.,
Mehmood M. Q.,
Ding Weiqiang,
Zhang Tianhang,
Chen Zhi Ning
Publication year - 2017
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201600213
Subject(s) - cladding (metalworking) , rayleigh scattering , optical force , dielectric , optics , waveguide , lorentz force , physics , lorentz transformation , scattering , optical fiber , core (optical fiber) , work (physics) , mechanics , classical mechanics , materials science , optoelectronics , optical tweezers , quantum mechanics , composite material , magnetic field
The stimulating connection between the counter‐intuitive optical pulling effects and the Lorentz force has not been investigated in literature. This work demonstrates that multiple absorbing or non‐absorbing dielectric Rayleigh objects can be pulled locally with gradientless travelling waves outside a finite‐sized cylindrical nano or micro waveguide, if it is made up of a hollow core along with the cladding of at least two different dielectrics of appropriate refractive indices. Lorentz force analysis reveals that the bound surface charges of Rayleigh scatterer experience backward force, which overcomes the positive bulk force and ultimately results in the net pulling of the scatterer for several spatial regions outside the waveguide. Finally, in order to control the pulling of multiple Rayleigh particles based on scattering force and binding force, we have proposed a possible cylindrical coupler set‐up. This work may open a new window of optical pulling force due to the exclusion of conventional structured tractor beams along with the artificial exotic matters.