We present a two-color Kerr microscopy system based on two electronically synchronized erbium-fiber laser oscillators with independently tunable emission energies spanning most of the visible spectrum. Combining a spatial resolution below 2 μm and sub-ps time resolution with high sensitivity and cryogenic sample temperatures, it is ideally suited for studying spin and valley dynamics in a wide range of two-dimensional materials. We illustrate its capabilities by studying a monolayer of the common semiconducting transition metal disulfide MoS2.
@article{arxiv.2105.13142,
title = {Two-color Kerr microscopy of two-dimensional materials with sub-picosecond time resolution},
author = {M. Kempf and A. Schubert and R. Schwartz and T. Korn},
journal= {arXiv preprint arXiv:2105.13142},
year = {2021}
}