锗酸铋上的硬X射线瞬态光栅光谱
光学
2021-07-21 v1 材料科学
摘要
光学域瞬态光栅（TG）光谱是一种通用的无背景四波混频技术，用于在时域探测振动、磁与电子自由度。新近开发的相干X射线自由电子激光源使其可拓展至X射线波段。X射线为TG带来多重优势：其大穿透深度允许探测材料体性质，其元素特异性可寻址核激发态，而其短波长可创建具有前所未有动量转移与空间分辨率的激发光栅。我们首次在7.1 keV硬X射线范围演示了TG激发。在锗酸铋（BGO）中，非共振TG激发产生相干光学声子，由光学探测脉冲的衍射作为时间函数被探测到。该实验展示了对材料体性质的探测能力，并为使用X射线探针且涉及纳米尺度TG空间周期的超快相干四波混频技术铺平了道路。
引用
@article{arxiv.2104.01030,
title = {Hard X-ray Transient Grating Spectroscopy on Bismuth Germanate},
author = {Jeremy R. Rouxel and Danny Fainozzi and Roman Mankowsky and Benedikt Rosner and Gediminas Seniutinas and Riccardo Mincigrucci and Sara Catalini and Laura Foglia and Riccardo Cucini and Florian Doring and Adam Kubec and Frieder Koch and Filippo Bencivenga and Andre Al Haddad and Alessandro Gessini and Alexei A. Maznev and Claudio Cirelli and Simon Gerber and Bill Pedrini and Giulia F. Mancini and Elia Razzoli and Max Burian and Hiroki Ueda and Georgios Pamfilidis and Eugenio Ferrari and Yunpei Deng and Aldo Mozzanica and Philip J. M. Johnson and Dmitry Ozerov and Maria G. Izzo and Cettina Bottari and Christopher Arrell and Edwin J. Divall and Serhane Zerdane and Mathias Sander and Gregor Knopp and Paul Beaud and Henrik T. Lemke and Chris J. Milne and Christian David and Renato Torre and Majed Chergui and Keith A. Nelson and Claudio Masciovecchio and Urs Staub and Luc Patthey and Cristian Svetina},
journal= {arXiv preprint arXiv:2104.01030},
year = {2021}
}
备注
11 pages, 4 figures