New Electromagnetic Modes in Space-Time Modulated Dispersion-Engineered Media
Optics
2018-06-20 v1
Abstract
We report on new electromagnetic modes in space-time modulated dispersion-engineered media. These modes exhibit unusual dispersion relation, field profile and scattering properties. They are generated by coupled codirectional space-time harmonic pairs, and occur in space-time periodic media whose constituent materials exhibit specific dispersion. Excitation of a slab of such a medium with subluminal modulation results in periodic transfer of energy between the incident frequency and a frequency shifted by a multiple of the modulation frequency, whereas superluminal modulation generates exponentially growing frequencies. These modes may find applications in optical mixers, terahertz sources and other optical devices.
Cite
@article{arxiv.1710.01625,
title = {New Electromagnetic Modes in Space-Time Modulated Dispersion-Engineered Media},
author = {Nima Chamanara and Zoé-Lise Deck-Léger and Christophe Caloz and Dikshitulu Kalluri},
journal= {arXiv preprint arXiv:1710.01625},
year = {2018}
}