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一种基于极值自发PT对称破缺点的周期性环形光波导网络构建的卓越相干完美吸收体和激光器。

A superior coherent perfect absorber and laser constructed from the periodic ring optical waveguide network based on extremum spontaneous PT-symmetric breaking points.

作者信息

Zhang Yao, Yang Xiangbo, Huang Mengli

机构信息

Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, China.

Longgang Affiliated High School of Central China Normal University, Shenzhen, 518116, China.

出版信息

Sci Rep. 2024 Nov 18;14(1):28390. doi: 10.1038/s41598-024-78871-9.

DOI:10.1038/s41598-024-78871-9
PMID:39551867
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11570599/
Abstract

In this study, we propose a superior coherent perfect absorber and laser (CPA laser) constructed from the one-dimensional (1D) two-material (TM) parity-time (PT) symmetric periodic ring optical waveguide network (PROWN). A novel method based on seeking the exact extremum spontaneous PT-symmetric breaking points is used for determining the imaginary part of the refractive indices of the materials composed of waveguides. The minimal overall output coefficient [Formula: see text] and maximal transmissivity [Formula: see text] can reach [Formula: see text] and [Formula: see text], respectively, which are 9 orders of magnitude smaller and larger than the previously reported values, respectively. It is also found that with the increment of unit cells, [Formula: see text] increases monotonically while [Formula: see text] decreases monotonically. Moreover, [Formula: see text] and [Formula: see text] are found to be varied with the periodicity of 1.866152 MHz. Our work provides a new method for optimizing CPA lasers.

摘要

在本研究中，我们提出了一种由一维（1D）双材料（TM）宇称时间（PT）对称周期环形光波导网络（PROWN）构成的卓越的相干完美吸收体与激光器（CPA激光器）。一种基于寻找精确极值自发PT对称破缺点的新方法被用于确定构成波导的材料的折射率虚部。最小的总输出系数[公式：见原文]和最大透过率[公式：见原文]分别可达[公式：见原文]和[公式：见原文]，它们分别比先前报道的值小9个数量级和大9个数量级。还发现随着晶胞数量的增加，[公式：见原文]单调增加而[公式：见原文]单调减小。此外，发现[公式：见原文]和[公式：见原文]以1.866152 MHz的周期变化。我们的工作为优化CPA激光器提供了一种新方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/c13502ac856e/41598_2024_78871_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/1bb7f9f88eb2/41598_2024_78871_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/80d825295806/41598_2024_78871_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/16856c6db951/41598_2024_78871_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/dc39009cbc6b/41598_2024_78871_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/c4ad6030fef0/41598_2024_78871_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/c13502ac856e/41598_2024_78871_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/1bb7f9f88eb2/41598_2024_78871_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/67bfa550ef5f/41598_2024_78871_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/80d825295806/41598_2024_78871_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/16856c6db951/41598_2024_78871_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/dc39009cbc6b/41598_2024_78871_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/c4ad6030fef0/41598_2024_78871_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a23/11570599/c13502ac856e/41598_2024_78871_Fig7_HTML.jpg

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