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X-typed curvilinear transport of strongly absorbing particle in a dual-beam fiber optical trap. 2019

Zhihai Liu, and Lu Wang, and Yu Zhang, and Siyu Lin, and Yaxun Zhang, and Xinghua Yang, and Jianzhong Zhang, and Jun Yang, and Libo Yuan

We propose and demonstrate a novel approach to transport a strongly absorbing particle in an X-typed trajectory reciprocally in pure liquid glycerol based on a dual-beam optical fiber trap. We perform the X-typed light field by integrating a glass microsphere on the tip of a two-core fiber. The motion of the absorbing particle in pure liquid glycerol is dominated by the Δα-type photophoretic forces (FΔα). The incident laser power determines the direction of FΔα. Therefore, we may perform the reciprocating transport of the absorbing particle by changing and controlling the laser power. It is simple to manufacture the fiber probe and convenient to operate the transport of the microparticle. Our research expands the applications of absorbing particles in targeted drug delivery, biological sampling, and optically mediated particle clearing.

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