Arbitrarily accelerating space-time wave packets
Abstract
All known realizations of optical wave packets that accelerate along their propagation axis, such as Airy wave packets in dispersive media or wave-front-modulated X-waves, exhibit a constant acceleration; that is, the group velocity varies linearly with propagation. Here we synthesize space-time wave packets that travel in free space with arbitrary axial acceleration profiles, including group velocities that change with integer or fractional exponents of the distance. Furthermore, we realize a composite acceleration profile: the wave packet first accelerates from an initial to a terminal group velocity, decelerates back to the initial value, and then travels at a fixed group velocity. These never-before-seen optical-acceleration phenomena are all produced using the same experimental arrangement that precisely sculpts the wave packet's spatio-temporal spectral structure.
Cite
@article{arxiv.2109.04009,
title = {Arbitrarily accelerating space-time wave packets},
author = {Layton A. Hall and Murat Yessenov and Ayman F. Abouraddy},
journal= {arXiv preprint arXiv:2109.04009},
year = {2022}
}