Microfabrication of Au film using optical vortex beam

Sho Kawagoe, Ryosuke Nakamura, Ryohei Tasaki, Hiroki Oshima, Mitsuhiro Higashihata, Daisuke Nakamura, Takashige Omatsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We fabricate Au microneedle structures by irradiating nanosecond optical vortex pulse, possessing orbital angular momentum (OAM), to Au thin film. Twisted microneedle associated with the handed-ness of optical vortex is formed. The partial liquid motion of the molten Au film and the OAM transfer effects play a role to establish a twisted Au microneedle. An Au microsphere on a twisted pillar is also achieved. Non-twisted structure is fabricated with picosecond optical vortex pulse irradiation due to unoptimized condition such as laser fluence, film thickness and unavoidable imperfections of the optical vortex.

Original languageEnglish
Pages (from-to)31-34
Number of pages4
JournalJournal of Laser Micro Nanoengineering
Issue number1
Publication statusPublished - Apr 1 2019

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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