Laser processing simulation for Marangoni-driven needle formation under optical vortex

Mamoru Tamura; Takashige Omatsu; Takuya Iida

doi:10.1117/12.2616129

27 October 2021 Laser processing simulation for Marangoni-driven needle formation under optical vortex

Mamoru Tamura, Takashige Omatsu, Takuya Iida

Proceedings Volume 11926, Optical Manipulation and Structured Materials Conference 2021; 119260Q (2021) https://doi.org/10.1117/12.2616129
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

We have theoretically clarified the Marangoni effect can contribute to the needle formation in laser processing with an optical vortex. Using the simulation method of laser processing based on the computational fluid dynamics, we evaluated the laser-induced heating, phase-change, and molten material behavior. Under the irradiation of optical vortex with ringshaped intensity distribution, the Marangoni force toward the beam center acted on the molten material. As a result, in the presence of the Marangoni effect, the protrusion structure could be formed. The obtained results will reveal the mechanism that the optical vortex forms the needle shape, and lead to the development of laser processing with the angular momentum.

Citation Download Citation

Mamoru Tamura, Takashige Omatsu, and Takuya Iida "Laser processing simulation for Marangoni-driven needle formation under optical vortex", Proc. SPIE 11926, Optical Manipulation and Structured Materials Conference 2021, 119260Q (27 October 2021); https://doi.org/10.1117/12.2616129

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