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10 September 2019 Generation of centi-meter scale twisted polymer fiber by high-order Bessel beam irradiation (Conference Presentation)
Junhyung Lee, Yoshihiko Arita, Reimon Matsuo, Haruki Kawaguchi, Katsuhiko Miyamoto, Kishan Dholakia, Takashige Omatsu
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Proceedings Volume 11098, Molecular and Nano Machines II; 1109809 (2019) https://doi.org/10.1117/12.2529055
Event: SPIE Organic Photonics + Electronics, 2019, San Diego, California, United States
Abstract
Optical vortex possesses an on-axial phase singularity and an orbital angular momentum (OAM) due to its spiral wavefront characterized by a topological charge ℓ. OAM of the optical vortex can twist or spin the target materials, such as silicon, metal, and polymer, to form chiral structures. In this paper, we report on the creation of helical microfibers by irradiating picosecond optical vortex pulses with a wavelength of 532 nm to ultraviolet curing resin via a two-photon-absorption photopolymerization process. Self-focusing effect of incident vortex pulses, arising from the photo-polymerization, confines efficiently optical vortex field to form a self-written helical fiber waveguide with the help of OAM transfer effect. The resulting helical microfibers exhibited a length of ~300 μm Also, we could control the twisted direction of fibers merely by changing the sign of the topological charge of optical vortex. These experiments will open up a new way to the practical application of helical microfiber to optical communications.
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Junhyung Lee, Yoshihiko Arita, Reimon Matsuo, Haruki Kawaguchi, Katsuhiko Miyamoto, Kishan Dholakia, and Takashige Omatsu "Generation of centi-meter scale twisted polymer fiber by high-order Bessel beam irradiation (Conference Presentation)", Proc. SPIE 11098, Molecular and Nano Machines II, 1109809 (10 September 2019); https://doi.org/10.1117/12.2529055
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KEYWORDS
Optical vortices
Picosecond phenomena
Polymers
Metals
Photopolymerization
Silicon
Spiral phase plates
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