[11a-A24-1~13] 3.6 Laser processing

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)

[11a-A24-12] Orbital angular momentum transfer and chiral nanostructure formation using a megawatt-class optical vortex array

〇Yoshiki Nakata¹ (1.The Univ. Osaka)

Keywords:

optical vortex array,orbital angular momentum,chiral nanostructure

We generate a megawatt-class large-scale optical vortex array using a DOE–SPP–4f optical system and apply it to copper surface processing. Donut-shaped ablation patterns and chiral nanoneedle structures are formed at the vortex singularities, demonstrating massively parallel orbital angular momentum transfer under high-power irradiation.