[10a-A22-1~13] 3.6 Laser processing

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[10a-A22-1] Research on freezing of materials under high pressure by Bessel-beam driven micro-explosions in transparent materials

〇Hirotaka Nakamura¹, Rin Utsunomiya¹, Ludovic Rapp², Alexandros Mouskeftaras³, Pikuz Tachiana¹, Alexis Amouretti¹, Takuya Kodama¹, Kai Taketoshi¹, Ryosuke Furukawa¹, Naoki Yamagata¹, Kosuke Nishitani¹, Ryosuke Kodama¹, Takahisa Shobu⁴, Aki Tominaga⁴, Yusuke Seto⁵, Takuo Okuchi⁶, Norimasa Ozaki¹ (1.The Univ. of Osaka, 2.Australia Nat. Univ., 3.Aix Marseille Univ., 4.JAEA, 5.Osaka Metro. Univ., 6.KURNS)

Keywords:

femtosecond laser,micro processing,freezing of materials under high pressure

Tight focusing of a -laser pulse with a few micro-Joule energy deep inside a crystal can deposit an energy density up to several MJ/cm³ in a sub-micron volume. Pressure created by the plasma expansion is high enough to generate new material phases, which is referred to as micro-explosion. Here we report an experiment relative to a micro-explosion. Targets were transparent Fluoride materials (CaF₂). Hence, we demonstrated X-ray diffraction (XRD) analysis of the material under high pressure and high temperature phase.