Refraction of space-time wave packets in a dispersive medium
Abstract
Space-time (ST) wave packets are a class of pulsed optical beams whose spatio-temporal spectral structure results in propagation invariance, tunable group velocity, and fascinating refractive phenomena. Here, we investigate the refraction of ST wave packets at a planar interface between two dispersive, homogeneous, isotropic media. We formulate a new refractive invariant for ST wave packets in this configuration, from which we obtain a law of refraction that determines the change in their group velocity across the interface. We verify this new refraction law in ZnSe and CdSe, both of which manifest large chromatic dispersion at near-infrared frequencies in the vicinity of their band edges. ST wave packets can thus be a tool in nonlinear optics for bridging large group-velocity mismatches in highly dispersive scenarios.
Keywords
Cite
@article{arxiv.2112.04003,
title = {Refraction of space-time wave packets in a dispersive medium},
author = {Murat Yessenov and Sanaz Faryadras and Sepehr Benis and David J. Hagan and Eric W. Van Stryland and Ayman F. Abouraddy},
journal= {arXiv preprint arXiv:2112.04003},
year = {2022}
}
Comments
5 pages, 4 figures