Wu Y L, Yin X, Hasaien J Z L, Tian Z Y, Ding Yang, Zhao Jimin
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Center for High-Pressure Sciences and Technology Advanced Research, Beijing 100094, China.
Rev Sci Instrum. 2021 Nov 1;92(11):113002. doi: 10.1063/5.0064071.
We conceive and construct an on-site in situ high-pressure time-resolved ultrafast optical spectroscopy instrument that facilitates ultrafast pump-probe dynamics measurements under high pressure conditions. We integrate an ultrafast pump-probe spectroscopy system with a diamond anvil cell (DAC) system. Significantly, both the DAC and the sample are fixed within the light path without motion and rotation throughout the whole ultrafast spectroscopy experiment, including tuning and calibrating the pressure. This instrument thus avoids introducing artifacts due to sample motion or rotation, enabling precision high-pressure ultrafast pump-probe dynamics investigations. As a demonstrating example, we compare the effect of on-site in situ conditions with off-site in situ conditions on the ultrafast dynamics of SrIrO under 0-44.5 GPa high pressure. Our data and analysis show that conventional possible artifacts are greatly reduced by using the on-site in situ layout. Our work helps the high-pressure ultrafast science investigation develop into a promising new area, which enables the exploration of nonequilibrium excited quantum states in the high-pressure regime.
我们构思并构建了一种现场原位高压时间分辨超快光学光谱仪，该仪器便于在高压条件下进行超快泵浦-探测动力学测量。我们将超快泵浦-探测光谱系统与金刚石对顶砧（DAC）系统集成在一起。重要的是，在整个超快光谱实验过程中，包括压力调节和校准，DAC和样品都固定在光路内，无需移动和旋转。因此，该仪器避免了由于样品移动或旋转而引入伪像，从而能够进行精确的高压超快泵浦-探测动力学研究。作为一个示例，我们比较了现场原位条件和非现场原位条件对SrIrO在0-44.5 GPa高压下超快动力学的影响。我们的数据和分析表明，使用现场原位布局可大大减少传统的可能伪像。我们的工作有助于高压超快科学研究发展成为一个有前景的新领域，从而能够探索高压 regime 中的非平衡激发量子态。
