Frequency Domain Berry Curvature Effect on Time Refraction
Mesoscale and Nanoscale Physics
2026-04-21 v2 Optics
Abstract
We demonstrate that there exist frequency domain Berry curvature in the wave function of photons in dispersive optical systems. This property arises from the frequency dispersion of its dielectric function, which makes Maxwell equations a non-standard eigenvalue equation, with the eigenvalue (frequency) appearing inside the operator itself. We study this new Berry curvature effect on time refraction of magnetoplasmon-polariton as an example. It can induce deflection in the trajectory of a photon and make the ray swing.
Cite
@article{arxiv.2508.12893,
title = {Frequency Domain Berry Curvature Effect on Time Refraction},
author = {Shiyue Deng and Yang Gao and Qian Niu},
journal= {arXiv preprint arXiv:2508.12893},
year = {2026}
}
Comments
Revised version. 17 pages, 9 figures