Macroscopic laser pulling based on the Knudsen force in rarefied gas
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Version 3 2023-01-23, 23:35
Version 2 2023-01-11, 17:26
Version 1 2023-01-11, 17:25
Posted on 2023-01-11 - 17:26
Optical pulling is an attractive concept due to the counterintuitive feature, the profound mechanism underneath and promising applications. In recent ten years, optical pulling of micro-nano objects have been fully demonstrated. However, optical pulling of a macroscopic object is challenging. Herein, laser pulling of a macroscopic object is presented in rarefied gas. The pulling force is originated from the Kundsen force when a gauss laser beam irradiates a macroscopic structure composed of the absorptive bulk cross-linked graphene material and a SiO2 layer. A torsional pendulum device qualitatively presents the laser pulling phenomenon. A gravity pendulum device was used to further measure the pulling force that is more than three orders of magnitudes larger than the radiation pressure. This work expands the scope of optical pulling from microscale to macroscale and provides an effective technique approach for macroscopic optical manipulations.
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Wang, Lei; Wang, Shige; Zhao, Qiuling; Wang, Xia (2023). Macroscopic laser pulling based on the Knudsen force in rarefied gas. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6277122.v2
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AUTHORS (4)
LW
Lei Wang
SW
Shige Wang
QZ
Qiuling Zhao
XW
Xia Wang