Ultrafast Structural Dynamics of Nanoparticles in Intense Laser Fields
Ultrafast Structural Dynamics of Nanoparticles in Intense Laser Fields
复制标题
强激光场中纳米粒子的超快结构动力学
DOI：
10.1103/physrevlett.123.123201
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发表时间：
2019
影响因子：
8.6
通讯作者：
他17名
中科院分区：
文献类型：
--
作者：
Nishiyama Toshiyuki;Kumagai Yoshiaki;Niozu Akinobu;Fukuzawa Hironobu;Motomura Koji;Bucher Maximilian;Ito Yuta;Takanashi Tsukasa;Asa Kazuki;Sato Yuhiro;You Daehyun;Li Yiwen;Ono Taishi;Kukk Edwin;Miron Catalin;Neagu Liviu;Katayama Tetsuo;他17名
飞秒激光脉冲为研究物质的超快相变和非平衡态开辟了新的领域。在这封信中，我们报告的结构动力学的原子团簇泵浦强近红外（NIR）脉冲到纳米等离子体状态。采用广角散射与强烈的飞秒X射线脉冲从自由电子激光源，我们发现，高度激发的氙纳米粒子保持其晶体体结构和密度的内核驱动NIR脉冲后很长时间。所观察到的纳米等离子体中的结构紊乱的出现与从簇的表面到内核的传播是一致的。
Femtosecond laser pulses have opened new frontiers for the study of ultrafast phase transitions and nonequilibrium states of matter. In this Letter, we report on structural dynamics in atomic clusters pumped with intense near-infrared (NIR) pulses into a nanoplasma state. Employing wide-angle scattering with intense femtosecond x-ray pulses from a free-electron laser source, we find that highly excited xenon nanoparticles retain their crystalline bulk structure and density in the inner core long after the driving NIR pulse. The observed emergence of structural disorder in the nanoplasma is consistent with a propagation from the surface to the inner core of the clusters.