[20p-E214-1~14] 4.3 Ultrafast Optics and Laser Processing

▲ [20p-E214-14] Dynamics of Long-lifetime Coherent Phonon in MoTe₂

〇Kotaro Makino¹、Yuta Saito¹、Paul Fons¹、Alexander V. Kolobov^1,2、Keiji Ueno³、Muneaki Hase⁴ (1.NeRI, AIST、2.Herzen Univ.、3.Saitama Univ.、4.Dept. of Appl. Phys., Univ. of Tsukuba)

キーワード：コヒーレントフォノン、MoTe2、電子格子相互作用

We carried out coherent phonon spectroscopy in a bulk crystal of 2H-MoTe₂ by employing optical pump-probe measure-ment. We found that the lifetime of the A_1g Raman-active phonon mode is unusually long even at room temperature. We also found that the frequency of the coherent phonon varies with the pump-probe time delay and its behavior strongly depends on the pump fluence.