期刊
OPTICS LETTERS
卷 46, 期 13, 页码 3151-3154出版社
Optica Publishing Group
DOI: 10.1364/OL.427432
关键词
-
类别
资金
- Science, Technology and Innovation Commission of Shenzhen Municipality [SGDX2019081623060558]
- National Key Research and Development Program of China [2020YFB1805901]
- National Natural Science Foundation of China [61805090, 62075075]
- China Postdoctoral Science Foundation [2017M622419]
- Hong Kong Scholars Program 2018 [XJ2018018]
This article discusses how loss can induce modal gain in non-Hermitian systems, and observes this phenomenon experimentally. By utilizing polarization-dependent loss in a single laser cavity, a new method for manipulating active cavity lasing is demonstrated.
For most photonics devices and systems, loss is desperately averted, since it will increase the power consumption and degrade the performance. However, in some non-Hermitian systems, loss can induce a modal gain when the parity-time symmetry is broken, which offers a new way to manipulate the lasing of active cavities. Here we experimentally observe the counterintuitive phenomenon in a single laser cavity assisted by the polarization-dependent loss. A parity-time symmetric system is constituted by the two orthogonally polarized photonic loops in a single laser cavity, which can guarantee the consistency of two coupling loops. The measured output power of the cavity depends on the cross-polarization loss, which reveals virtually opposite relationships before and after the critical point. It provides a novel, to the best of our knowledge, understanding of polarization loss and shows great potential for lasing manipulation in a single cavity with polarization control. (C) 2021 Optical Society of America
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据