Pulling cylindrical particles using a soft-nonparaxial tractor beam

Andrey Novitsky; Weiqiang Ding; Maoyan Wang; Dongliang Gao; Andrei V. Lavrinenko; Cheng Wei Qiu

doi:10.1038/s41598-017-00735-2

Pulling cylindrical particles using a soft-nonparaxial tractor beam

Andrey Novitsky^*
, Weiqiang Ding
, Maoyan Wang
, Dongliang Gao
, Andrei V. Lavrinenko
, Cheng Wei Qiu

^*Corresponding author for this work

School of Physics

Technical University of Denmark
Belarusian State University
National University of Singapore
Soochow University

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

In order to pull objects towards the light source a single tractor beam inevitably needs to be strongly nonparaxial. This stringent requirement makes such a tractor beam somewhat hypothetical. Here we reveal that the cylindrical shape of dielectric particles can effectively mitigate the nonparaxiality requirements, reducing the incidence angle of the partial plane waves of the light beam down to 45° and even to 30° for respectively dipole and dipole-quadrupole objects. The optical pulling force attributed to the interaction of magnetic dipole and magnetic quadrupole moments of dielectric cylinders occurs due to the TE rather than TM polarization. Therefore, the polarization state of the incident beam can be utilized as an external control for switching between the pushing and pulling forces. The results have application values towards optical micromanipulation, transportation and sorting of targeted particles.

Original language	English
Article number	652
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-00735-2
State	Published - 1 Dec 2017

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title = "Pulling cylindrical particles using a soft-nonparaxial tractor beam",

abstract = "In order to pull objects towards the light source a single tractor beam inevitably needs to be strongly nonparaxial. This stringent requirement makes such a tractor beam somewhat hypothetical. Here we reveal that the cylindrical shape of dielectric particles can effectively mitigate the nonparaxiality requirements, reducing the incidence angle of the partial plane waves of the light beam down to 45° and even to 30° for respectively dipole and dipole-quadrupole objects. The optical pulling force attributed to the interaction of magnetic dipole and magnetic quadrupole moments of dielectric cylinders occurs due to the TE rather than TM polarization. Therefore, the polarization state of the incident beam can be utilized as an external control for switching between the pushing and pulling forces. The results have application values towards optical micromanipulation, transportation and sorting of targeted particles.",

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AU - Novitsky, Andrey

AU - Ding, Weiqiang

AU - Wang, Maoyan

AU - Gao, Dongliang

AU - Lavrinenko, Andrei V.

AU - Qiu, Cheng Wei

PY - 2017/12/1

Y1 - 2017/12/1

N2 - In order to pull objects towards the light source a single tractor beam inevitably needs to be strongly nonparaxial. This stringent requirement makes such a tractor beam somewhat hypothetical. Here we reveal that the cylindrical shape of dielectric particles can effectively mitigate the nonparaxiality requirements, reducing the incidence angle of the partial plane waves of the light beam down to 45° and even to 30° for respectively dipole and dipole-quadrupole objects. The optical pulling force attributed to the interaction of magnetic dipole and magnetic quadrupole moments of dielectric cylinders occurs due to the TE rather than TM polarization. Therefore, the polarization state of the incident beam can be utilized as an external control for switching between the pushing and pulling forces. The results have application values towards optical micromanipulation, transportation and sorting of targeted particles.

AB - In order to pull objects towards the light source a single tractor beam inevitably needs to be strongly nonparaxial. This stringent requirement makes such a tractor beam somewhat hypothetical. Here we reveal that the cylindrical shape of dielectric particles can effectively mitigate the nonparaxiality requirements, reducing the incidence angle of the partial plane waves of the light beam down to 45° and even to 30° for respectively dipole and dipole-quadrupole objects. The optical pulling force attributed to the interaction of magnetic dipole and magnetic quadrupole moments of dielectric cylinders occurs due to the TE rather than TM polarization. Therefore, the polarization state of the incident beam can be utilized as an external control for switching between the pushing and pulling forces. The results have application values towards optical micromanipulation, transportation and sorting of targeted particles.

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SN - 2045-2322

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Pulling cylindrical particles using a soft-nonparaxial tractor beam

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