https://doi.org/10.1051/epjconf/202430907015
The role of crystal orientation in attosecond photoinjection dynamics in germanium
1 Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci, 20133 Milano, Italy
2 CNR - Istituto Nanoscienze, via Campi 213/A, I-41125 Modena, Italy
3 Institute for Photonics and Nanotechnologies, IFN-CNR, 20133 Milano, Italy
* Corresponding author: matteo.talarico@polimi.it
Published online: 31 October 2024
Ultrashort light pulses can be used to manipulate electronic and optical properties of solids at extreme temporal scales, paving the way to the study of ultrafast electron dynamics. In recent years, attosecond-based spectroscopic techniques have proved to be an instrumental tool in such studies. To this end, we investigated the effects of crystal orientation on ultrafast photoinjection dynamics in germanium using attosecond transient reflectance spectroscopy (ATRS) aided by time-dependent density functional theory (TD-DFT) calculations. Our results show that ATRS is sensitive to subtle changes in the transient reflectance due to crystal orientation, although carrier photoinjection in germanium is qualitatively robust against crystal rotation, displaying similar photoinjection processes and timings at two different crystal angles.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
