Optical control of vibrational coherence triggered by an ultrafast phase transition
Abstract
Femtosecond time-resolved x-ray diffraction is employed to study the dynamics of the periodic lattice distortion (PLD) associated with the charge-density-wave (CDW) in K0.3MoO3. Using a multi-pulse scheme we show the ability to extend the lifetime of coherent oscillations of the PLD about the undistorted structure through re-excitation of the electronic states. This suggests that it is possible to enter a regime where the symmetry of the potential energy landscape corresponds to the high symmetry phase but the scattering pathways that lead to the damping of coherent dynamics are still controllable by altering the electronic state population. The demonstrated control over the coherence time offers new routes for manipulation of coherent lattice states.
Keywords
Cite
@article{arxiv.1902.00388,
title = {Optical control of vibrational coherence triggered by an ultrafast phase transition},
author = {M. J. Neugebauer and T. Huber and M. Savoini and E. Abreu and V. Esposito and M. Kubli and L. Rettig and E. Bothschafter and S. Grübel and T. Kubacka and J. Rittmann and G. Ingold and P. Beaud and D. Dominko and J. Demsar and S. L. Johnson},
journal= {arXiv preprint arXiv:1902.00388},
year = {2019}
}
Comments
18 pages, 5 figures, including supplementary information