Nonsymmetric evanescent coupling in photonics
Optics
2025-06-17 v2
Abstract
Asymmetrical interactions are ubiquitous in nature, and in physics their study becomes fundamental. Despite the prevalence of evanescent coupling in physics, little attention has been paid to wave function profiles, with symmetrical reciprocal interactions often assumed for practical reasons. This work challenges that assumption by analytically demonstrating the origin of nonsymmetrical coupling in a photonic platform, focusing on the behavior of evanescent tails from adjacent waveguides. We experimentally validate an asymmetrical dynamics by studying detuned photonic directional couplers, fabricated via femtosecond laser writing, and corroborate our findings through continuous numerical simulations.
Cite
@article{arxiv.2407.18174,
title = {Nonsymmetric evanescent coupling in photonics},
author = {Rodrigo A. Vicencio and Diego Román-Cortés and Martın Rubio-Saldías and Paloma Vildoso and Luis E. F. Foa Torres},
journal= {arXiv preprint arXiv:2407.18174},
year = {2025}
}
Comments
6 pages, 3 figures