Virtual Parity-Time Symmetry
Optics
2020-05-18 v1 Mesoscale and Nanoscale Physics
Applied Physics
Abstract
Parity-time (PT) symmetry has been opening exciting opportunities in optics, yet the required careful balance of loss and gain has been hindering its practical implementations. Here, we propose a gain-free route to PT-symmetry based on non-monochromatic excitations that mimic loss and gain in passive systems. Based on the concept of virtual absorption, extended here to implement also virtual gain, we induce PT-symmetry and its landmark effects, such as broken phase transitions, anisotropic transmission resonances and laser-absorber pairs, in a fully passive, hence inherently stable, system. These results open a path to establish PT-symmetric phenomena in purely passive platforms.
Cite
@article{arxiv.1911.12875,
title = {Virtual Parity-Time Symmetry},
author = {Huanan Li and Ahmed Mekawy and Alex Krasnok and Andrea Alù},
journal= {arXiv preprint arXiv:1911.12875},
year = {2020}
}
Comments
18 pages, 4 figures, and the supplement is not included