[8p-N405-1~18] 3.5 Ultrashort-pulse and high-intensity lasers

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

[8p-N405-1] Ultrafast optical response of SnSe under intense photoexcitation

〇Hiroshi Tanimura¹, Takao Homma², Norihiko Okamoto², Toshitaro Nose³, Yuji Sutou^4,5, Tetsu Ichitsubo² (1.DENJIKEN, 2.Tohoku Univ. (IMR), 3.Kyoto Univ. (Eng.), 4.Tohoku Univ. (Eng.), 5.Tohoku Univ. (AIMR))

Keywords:

phase change materials,ultrafast optical spectroscopy

Phase-change materials typically utilize the transition between crystalline and amorphous phases for information storage. In recent years, however, materials that exploit property changes between crystalline–crystalline phases have attracted growing attention. SnSe exhibits a strain–unstrained transition accompanied by property changes at high temperatures, and it is of particular interest whether this phase transition can be induced by photoexcitation. In this study, we conducted time-resolved optical spectroscopy using pump light with a high absorption coefficient and report on the ultrafast optical response of SnSe under conditions of high-density excitation.