Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals
Abstract
Time- and angle-resolved photoemission spectroscopy is a powerful probe of electronic band structures out of equilibrium. Tuning time and energy resolution to suit a particular scientific question has become an increasingly important experimental consideration. Many instruments use cascaded frequency doubling in nonlinear crystals to generate the required ultraviolet probe pulses. We demonstrate how calculations clarify the relationship between laser bandwidth and nonlinear crystal thickness contributing to experimental resolutions and place intrinsic limits on the achievable time-bandwidth product. Experimentally, we tune time and energy resolution by varying the thickness of nonlinear -BaBO crystals for frequency up-conversion, providing for a flexible experiment design. We achieve time resolutions of 58 to 103 fs and corresponding energy resolutions of 55 to 27 meV.
Keywords
Cite
@article{arxiv.2006.07758,
title = {Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals},
author = {Alexandre Gauthier and Jonathan A. Sobota and Nicolas Gauthier and Ke-Jun Xu and Heike Pfau and Costel Rotundu and Zhi-Xun Shen and Patrick S. Kirchmann},
journal= {arXiv preprint arXiv:2006.07758},
year = {2020}
}
Comments
13 pages, 7 figures