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10 March 2021 Formation of twisted Au microstructures by optical vortex pulse irradiation
Tsubasa Fujimoto, Miki Kawamoto, Mitsuhiro Higashihata, Daisuke Nakamura, Hiroshi Ikenoue
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Proceedings Volume 11674, Laser-based Micro- and Nanoprocessing XV; 1167410 (2021) https://doi.org/10.1117/12.2577106
Event: SPIE LASE, 2021, Online Only
Abstract
The formation of a twisted Au microstructure was demonstrated by irradiating the Au thin film with a focused optical vortex laser pulse. The theoretically calculated torque generated by optical radiation force of optical vortex was confirmed to be consistent with the twist direction of the experimental results. The microstructures formed by changing the focal position were experimentally investigated. Through simulations, it was shown that the spherical wave of the focused beam may affect the distribution of the optical radiation force at the defocus positions.
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Tsubasa Fujimoto, Miki Kawamoto, Mitsuhiro Higashihata, Daisuke Nakamura, and Hiroshi Ikenoue "Formation of twisted Au microstructures by optical vortex pulse irradiation", Proc. SPIE 11674, Laser-based Micro- and Nanoprocessing XV, 1167410 (10 March 2021); https://doi.org/10.1117/12.2577106
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KEYWORDS
Gold
Optical vortices
Laser optics
Optical simulations
Pulsed laser operation
Thin films
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