[23a-13N-1~9] 3.5 Ultrashort-pulse and high-intensity lasers (formerly 3.6)

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[23a-13N-8] Ultrafast optical response and photoinduced phase transition mechanism of MnTe thin film

〇Hiroshi Tanimura¹, Shunsuke Mori², Tetsu Ichitsubo¹, Yuji Sutou^2,3 (1.IMR, Tohoku Univ., 2.Tohoku Univ. (Eng.), 3.AIMR,Tohoku Univ.)

Keywords:

phase change materials,fs-laser,ultrafast optical spectroscopy

Phase-change materials are used in DVDs and Blu-ray Discs for information recording using the difference in optical properties between the crystalline and amorphous phases. Recently, phase-change materials based on the crystal-crystal phase transition have been developed, in which the energy consumption is smaller and the phase-change speed is faster than that of conventional phase-change materials. In this presentation, we describe the ultrafast optical response and the mechanism of non-thermal ultrafast phase transition of MnTe thin films investigated by using femtosecond lasers.