[11a-N321-1~11] 3.7 Laser processing

△ [11a-N321-9] Femtosecond-laser induced crystal growth in Al₂O₃-Lu₂O₃ glass fabricated by containerless melting method

〇Tatsuya Okuno¹, Yasuhiko Shimotsuma¹, Masahiro Shimizu¹, Kiyotaka Miura¹ (1.Kyoto Univ.)

Keywords:glass, crystallization, femtosecond laser

The local crystallization in glass can be successfully induced by the femtosecond laser irradiation. In Al₂O₃-R₂O₃ (R = Dy, Y) glass, we have confirmed the crystallized region with a width of several tens nanometer scale was self-assembled in the direction perpendicular to the laser polarization. In the present study, we aim to reveal the crystallization dynamics. We have confirmed the formation of periodic nanostructures consisting of localized crystallization regions in Al₂O₃-Lu₂O₃ glass fabricated by containerless melting method and evaluated the time scale of crystallization.