Scattering exceptional point in the visible
Abstract Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately, two-dimensional systems at EPs have been exploited for their exotic scattering features, ye...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2023-09-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-023-01282-4 |
| _version_ | 1797556326161711104 |
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| author | Tao He Zhanyi Zhang Jingyuan Zhu Yuzhi Shi Zhipeng Li Heng Wei Zeyong Wei Yong Li Zhanshan Wang Cheng-Wei Qiu Xinbin Cheng |
| author_facet | Tao He Zhanyi Zhang Jingyuan Zhu Yuzhi Shi Zhipeng Li Heng Wei Zeyong Wei Yong Li Zhanshan Wang Cheng-Wei Qiu Xinbin Cheng |
| author_sort | Tao He |
| collection | DOAJ |
| description | Abstract Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately, two-dimensional systems at EPs have been exploited for their exotic scattering features, yet so far been limited to only the non-visible waveband. Here, we report a universal paradigm for achieving a high-efficiency EP in the visible by leveraging interlayer loss to accurately control the interplay between the lossy structure and scattering lightwaves. A bilayer framework is demonstrated to reflect back the incident light from the left side ( | r −1 | >0.999) and absorb the incident light from the right side ( | r +1 | < 10–4). As a proof of concept, a bilayer metasurface is demonstrated to reflect and absorb the incident light with experimental efficiencies of 88% and 85%, respectively, at 532 nm. Our results open the way for a new class of nanoscale devices and power up new opportunities for EP physics. |
| first_indexed | 2024-03-10T17:01:15Z |
| format | Article |
| id | doaj.art-c1114accb2c04ff09c0bb88288fe7f22 |
| institution | Directory Open Access Journal |
| issn | 2047-7538 |
| language | English |
| last_indexed | 2024-03-10T17:01:15Z |
| publishDate | 2023-09-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj.art-c1114accb2c04ff09c0bb88288fe7f222023-11-20T10:58:32ZengNature Publishing GroupLight: Science & Applications2047-75382023-09-011211810.1038/s41377-023-01282-4Scattering exceptional point in the visibleTao He0Zhanyi Zhang1Jingyuan Zhu2Yuzhi Shi3Zhipeng Li4Heng Wei5Zeyong Wei6Yong Li7Zhanshan Wang8Cheng-Wei Qiu9Xinbin Cheng10MOE Key Laboratory of Advanced Micro-Structured MaterialsMOE Key Laboratory of Advanced Micro-Structured MaterialsMOE Key Laboratory of Advanced Micro-Structured MaterialsMOE Key Laboratory of Advanced Micro-Structured MaterialsDepartment of Electrical and Computer Engineering, National University of SingaporeDepartment of Electrical and Computer Engineering, National University of SingaporeMOE Key Laboratory of Advanced Micro-Structured MaterialsInstitute of Acoustics, School of Physics Science and Engineering, Tongji UniversityMOE Key Laboratory of Advanced Micro-Structured MaterialsDepartment of Electrical and Computer Engineering, National University of SingaporeMOE Key Laboratory of Advanced Micro-Structured MaterialsAbstract Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately, two-dimensional systems at EPs have been exploited for their exotic scattering features, yet so far been limited to only the non-visible waveband. Here, we report a universal paradigm for achieving a high-efficiency EP in the visible by leveraging interlayer loss to accurately control the interplay between the lossy structure and scattering lightwaves. A bilayer framework is demonstrated to reflect back the incident light from the left side ( | r −1 | >0.999) and absorb the incident light from the right side ( | r +1 | < 10–4). As a proof of concept, a bilayer metasurface is demonstrated to reflect and absorb the incident light with experimental efficiencies of 88% and 85%, respectively, at 532 nm. Our results open the way for a new class of nanoscale devices and power up new opportunities for EP physics.https://doi.org/10.1038/s41377-023-01282-4 |
| spellingShingle | Tao He Zhanyi Zhang Jingyuan Zhu Yuzhi Shi Zhipeng Li Heng Wei Zeyong Wei Yong Li Zhanshan Wang Cheng-Wei Qiu Xinbin Cheng Scattering exceptional point in the visible Light: Science & Applications |
| title | Scattering exceptional point in the visible |
| title_full | Scattering exceptional point in the visible |
| title_fullStr | Scattering exceptional point in the visible |
| title_full_unstemmed | Scattering exceptional point in the visible |
| title_short | Scattering exceptional point in the visible |
| title_sort | scattering exceptional point in the visible |
| url | https://doi.org/10.1038/s41377-023-01282-4 |
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