[17p-W9_326-1~16] 3.5 Ultrashort-pulse and high-intensity lasers

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)

[17p-W9_326-4] Visualization of the Longitudinal Electric Field

〇(B)Takeru Kato¹, Ryunosuke Hasegawa¹, Taro Sekikawa¹ (1.Hokkaido Univ.)

Keywords:

longitudinal electric field,radially polarized beam

Although light is typically a transverse wave, it is known that a longitudinal electric field oriented along the optical axis is formed near the focus when tightly focused with a high numerical aperture (NA). In this study, we attempted to visualize this longitudinal electric field by focusing a radially polarized beam using a high-NA aspheric lens. As a result, we obtained a spatial distribution image attributed to the longitudinal electric field in the focal region.