Imaging plasma formation in isolated nanoparticles with ultrafast resonant scattering
Imaging plasma formation in isolated nanoparticles with ultrafast resonant scattering
复制标题
DOI：
10.1063/4.0000006
复制
发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
D. Rupp;L. Flückiger;M. Adolph;A. Colombo;T. Gorkhover;M. Harmand;M. Krikunova;J. P. Müller;T. Oelze;Y. Ovcharenko;M. Richter;M. Sauppe;S. Schorb;R. Treusch;D. Wolter;C. Bostedt;T. Möller
中科院分区：
文献类型：
--
作者：
D. Rupp;L. Flückiger;M. Adolph;A. Colombo;T. Gorkhover;M. Harmand;M. Krikunova;J. P. Müller;T. Oelze;Y. Ovcharenko;M. Richter;M. Sauppe;S. Schorb;R. Treusch;D. Wolter;C. Bostedt;T. Möller
我们记录了单个氙团簇在强紫外光脉冲照射下的衍射图，以研究光诱导电子变化对散射响应的影响。在不同的中性态和离子态Xe的4D内壳层共振波长范围内，用短波长脉冲照射团簇，得到了与团簇中低或高电荷态区域明显不同的光学性质。数据显示，在原本均匀的样品中出现了空间延伸数十纳米的瞬变结构。模拟表明，电离和纳米等离子体的形成导致团簇中的光致外壳折射率发生强烈变化。所提出的共振散射方法使超快电子动力学能够在其自然时间尺度上成像。
We have recorded the diffraction patterns from individual xenon clusters irradiated with intense extreme ultraviolet pulses to investigate the influence of light-induced electronic changes on the scattering response. The clusters were irradiated with short wavelength pulses in the wavelength regime of different 4d inner-shell resonances of neutral and ionic xenon, resulting in distinctly different optical properties from areas in the clusters with lower or higher charge states. The data show the emergence of a transient structure with a spatial extension of tens of nanometers within the otherwise homogeneous sample. Simulations indicate that ionization and nanoplasma formation result in a light-induced outer shell in the cluster with a strongly altered refractive index. The presented resonant scattering approach enables imaging of ultrafast electron dynamics on their natural timescale.