Asymmetric nonlinear-mode-conversion in an optical waveguide with PT symmetry
Abstract
Asymmetric mode transformation in waveguide is of great significance for on-chip integrated devices with one-way effect, while it is challenging to achieve asymmetric nonlinear-mode-conversion (NMC) due to the limitations imposed by phase-matching. In this letter, we theoretically proposed a new scheme for realizing asymmetric NMC by combining frequency-doubling process and periodic PT symmetric modulation in an optical waveguide. By engineering the one-way momentum from PT symmetric modulation, we have demonstrated the unidirectional conversion from pump to second harmonic with desired guided modes. Our findings offer new opportunities for manipulating nonlinear optical fields with PT symmetry, which could further boost more exploration on on-chip nonlinear devices assisted by non-Hermitian optics.
Keywords
Cite
@article{arxiv.2206.04211,
title = {Asymmetric nonlinear-mode-conversion in an optical waveguide with PT symmetry},
author = {Changdong Chen and Youwen Liu and Lina Zhao and Xiaopeng Hu and Yangyang Fu},
journal= {arXiv preprint arXiv:2206.04211},
year = {2022}
}
Comments
to be published in Frontiers of Physics