Photopolymerization with high-order Bessel light beams

Graham Bruce
Monday 22 June 2020

Yoshihiko Arita, Jun Hyung Lee, Haruki Kawaguchi, Reimon Matsuo, Katsuhiko Miyamoto, Kishan Dholakia, and Takashige Omatsu

Opt. Lett. 45, 4080 (2020)

We study photopolymerization with high-order Bessel light beams with phase singularities on-axis. Self-trapping and self-focusing of the propagation-invariant light beams in a photopolymer allow the fabrication
of extended helical microfibers with a length scale of a centimeter, which is more than an order of magnitude larger than the propagation distance of the Bessel light beams. We show the evolution of microfibers rotating at a rate proportional to the incident optical power, while the periodicity of the helical structures remains constant irrespective of the laser power. This suggests that optical momentum transfer playing a predominant role in the growth and rotation of such fiber structures.

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