[23p-12B-1~14] 3.1 Basic optics and frontier of optics (merged with formerly 3.2 Equipment optics and materials)

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[23p-12B-1] Enhancement of the Longitudinal Electric Field of a Radially Polarized Beam through Total Reflection on a Glass Interface and Application to Laser Micro-Processing

Yukine Tsuru^1,2, 〇Yuichi Kozawa¹, Yuuki Uesugi¹, Shunichi Sato¹ (1.IMRAM, Tohoku Univ., 2.Grad. Sch. of Eng., Tohoku Univ.)

Keywords:

Radial polarization,Vector beam,Laser processing

In this presentation, we investigate the focusing property of a tightly focused radially polarized beam with an annular-shaped amplitude mask when the beam is focused on the back surface of a glass plate. The focal spot size and the strength of the longitudinal field at the focus are analyzed. Furthermore, we discuss the relationship between the focusing property and the result of laser ablation processing under these conditions.