Arita Yoshihiko, Lee Junhyung, Kawaguchi Haruki, Matsuo Reimon, Miyamoto Katsuhiko, Dholakia Kishan, Omatsu Takashige
Opt Lett. 2020 Jul 15;45(14):4080-4083. doi: 10.1364/OL.396012.
We study photopolymerization with high-order Bessel light beams with phase singularities on-axis. Self-trapping and self-focusing of 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 plays a predominant role in the growth and rotation of such fiber structures.
