Multiple Exceptional Points in APT–Symmetric Cantor Multilayers
In this study, we explore the anisotropic reflection of light waves around the exceptional points (EPs) in anti-parity-time−symmetric (APT−symmetric) Cantor dielectric multilayers. This one-dimensional fractal structure governed by the Cantor substitution law is modulated to satisfy APT symmetry. Th...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/2/197 |
| _version_ | 1797621596058288128 |
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| author | Ming Fang Yang Wang Pu Zhang Haihong Xu Dong Zhao |
| author_facet | Ming Fang Yang Wang Pu Zhang Haihong Xu Dong Zhao |
| author_sort | Ming Fang |
| collection | DOAJ |
| description | In this study, we explore the anisotropic reflection of light waves around the exceptional points (EPs) in anti-parity-time−symmetric (APT−symmetric) Cantor dielectric multilayers. This one-dimensional fractal structure governed by the Cantor substitution law is modulated to satisfy APT symmetry. The Cantor multilayers are aperiodic and support optical fractal resonances. The optical fractal effect combined with APT symmetry can induce multiple exceptional points (EPs) in the parameter space by modulating the loss coefficient of materials and optical frequency. Reflection anisotropy for light waves incident from two opposite directions presents unidirectional suppression and enhancement around EPs. This study can be utilized for multiple wavelengths of photonic suppressors and reflectors. |
| first_indexed | 2024-03-11T08:59:18Z |
| format | Article |
| id | doaj.art-c176bec582454af6b383c3d1423a03a6 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T08:59:18Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-c176bec582454af6b383c3d1423a03a62023-11-16T19:54:49ZengMDPI AGCrystals2073-43522023-01-0113219710.3390/cryst13020197Multiple Exceptional Points in APT–Symmetric Cantor MultilayersMing Fang0Yang Wang1Pu Zhang2Haihong Xu3Dong Zhao4School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaHubei Provincial Key Laboratory of Optoelectronic Information and Intelligent Control, Xianning 437100, ChinaHubei Provincial Key Laboratory of Optoelectronic Information and Intelligent Control, Xianning 437100, ChinaSchool of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaIn this study, we explore the anisotropic reflection of light waves around the exceptional points (EPs) in anti-parity-time−symmetric (APT−symmetric) Cantor dielectric multilayers. This one-dimensional fractal structure governed by the Cantor substitution law is modulated to satisfy APT symmetry. The Cantor multilayers are aperiodic and support optical fractal resonances. The optical fractal effect combined with APT symmetry can induce multiple exceptional points (EPs) in the parameter space by modulating the loss coefficient of materials and optical frequency. Reflection anisotropy for light waves incident from two opposite directions presents unidirectional suppression and enhancement around EPs. This study can be utilized for multiple wavelengths of photonic suppressors and reflectors.https://www.mdpi.com/2073-4352/13/2/197APT symmetrymultiple exceptional pointsoptical fractalreflection anisotropyCantor multilayers |
| spellingShingle | Ming Fang Yang Wang Pu Zhang Haihong Xu Dong Zhao Multiple Exceptional Points in APT–Symmetric Cantor Multilayers Crystals APT symmetry multiple exceptional points optical fractal reflection anisotropy Cantor multilayers |
| title | Multiple Exceptional Points in APT–Symmetric Cantor Multilayers |
| title_full | Multiple Exceptional Points in APT–Symmetric Cantor Multilayers |
| title_fullStr | Multiple Exceptional Points in APT–Symmetric Cantor Multilayers |
| title_full_unstemmed | Multiple Exceptional Points in APT–Symmetric Cantor Multilayers |
| title_short | Multiple Exceptional Points in APT–Symmetric Cantor Multilayers |
| title_sort | multiple exceptional points in apt symmetric cantor multilayers |
| topic | APT symmetry multiple exceptional points optical fractal reflection anisotropy Cantor multilayers |
| url | https://www.mdpi.com/2073-4352/13/2/197 |
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