Nonreciprocal Control of the Speed of Light Using Cavity Magnonics
Optics
2025-02-18 v1 Materials Science
Abstract
We demonstrate nonreciprocal control of the speed of light by sending a microwave pulse through a cavity magnonics device. In contrast to reciprocal group velocity controlled by conventional electromagnetically induced transparency (EIT) effect, incorporating dissipative magnon-photon coupling establishes a non-reciprocal EIT effect, allowing slow and fast light propagation in opposite directions at the same frequency with comparable amplitude. Remarkably, reversing the magnetic field enables a directional switch between non-reciprocal fast and slow light. This discovery may offer new possibilities for pulse time regulation in microwave signal communications, neuromorphic computing, and quantum signal processing.
Cite
@article{arxiv.2502.10595,
title = {Nonreciprocal Control of the Speed of Light Using Cavity Magnonics},
author = {Jiguang Yao and Chenyang Lu and Xiaolong Fan and Desheng Xue and Greg E. Bridges and C. -M. Hu},
journal= {arXiv preprint arXiv:2502.10595},
year = {2025}
}
Comments
7 pages, 4 figures