Polarization-controlled non-Hermitian metasurfaces for ultra-sensitive terahertz sensing
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866908468820049920 |
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| author | Shi, Xintong Lin, Hai Liu, Tingting Shen, Yun Tang, Rongxin Li, Le Zhang, Junyi Wu, Yanjie Duan, Shouxin Zhao, Chenhui Xiao, Shuyuan |
| author_facet | Shi, Xintong Lin, Hai Liu, Tingting Shen, Yun Tang, Rongxin Li, Le Zhang, Junyi Wu, Yanjie Duan, Shouxin Zhao, Chenhui Xiao, Shuyuan |
| contents | Non-Hermitian systems offer significant advantages in sensor design, especially at the exceptional points. However, the extreme sensitivity near these points poses great challenges due to fabrication errors and system noises, which degrade sensing performance. To address this, we introduce a novel approach leveraging the polarization degrees of freedom in non-Hermitian systems. In this work, we establish a direct relation between the incident polarization and the transmission phase of a coupled metasurface system and achieve the polarization-controlled phase singularity even post-fabrication. The incident polarization angle can be utilized as a sensing index, which enables indirect and accurate measurement. The theoretical approach is experimentally validated using a general design of THz non-Hermitian metasurface sensors. Our method enhances robustness and sensitivity, opening new avenues for practical applications in ultra-sensitive sensing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_00579 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Polarization-controlled non-Hermitian metasurfaces for ultra-sensitive terahertz sensing Shi, Xintong Lin, Hai Liu, Tingting Shen, Yun Tang, Rongxin Li, Le Zhang, Junyi Wu, Yanjie Duan, Shouxin Zhao, Chenhui Xiao, Shuyuan Optics Applied Physics Non-Hermitian systems offer significant advantages in sensor design, especially at the exceptional points. However, the extreme sensitivity near these points poses great challenges due to fabrication errors and system noises, which degrade sensing performance. To address this, we introduce a novel approach leveraging the polarization degrees of freedom in non-Hermitian systems. In this work, we establish a direct relation between the incident polarization and the transmission phase of a coupled metasurface system and achieve the polarization-controlled phase singularity even post-fabrication. The incident polarization angle can be utilized as a sensing index, which enables indirect and accurate measurement. The theoretical approach is experimentally validated using a general design of THz non-Hermitian metasurface sensors. Our method enhances robustness and sensitivity, opening new avenues for practical applications in ultra-sensitive sensing. |
| title | Polarization-controlled non-Hermitian metasurfaces for ultra-sensitive terahertz sensing |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2408.00579 |