Laser microprocessing of metal surfaces using a tightly focused radially polarized beam

Yuichi Kozawa, Masaki Sato, Yuuki Uesugi, Shunichi Sato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Tight focusing of a radially polarized beam is used for single-shot laser ablation of metals. The strong longitudinal field is generated at the focus, and its contribution to the ablation process is comprehensively examined for various metal materials. In the presence of the longitudinal field at the focus, a fabricated crater at the surface exhibits either a spot shape or a doughnut shape, depending on the material. The experimental results indicate that the strong longitudinal electric field on metal surfaces is capable of promoting material removal, which may provide a novel processing scheme in ultrafast laser microprocessing with enhanced spatial resolution.

Original languageEnglish
Pages (from-to)6234-6237
Number of pages4
JournalOptics Letters
Volume45
Issue number22
DOIs
Publication statusPublished - 2020 Nov 15

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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