Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance
Mode overlapping promotes the capability in manipulating optical absorption. Based on such a mechanism, an all-dielectric metasurface has the capability of perfectly absorbing incident optical energy without the assistance of a mirror. Here, an array of thin germanium waveguide-like units is designe...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9832678/ |
| _version_ | 1828183803433058304 |
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| author | Yijin Zhang Xiyuan Cao Xiaoyu Liu Li Liu Longsheng Wu Jian Sun Zhongying Xue Yi Jin Aimin Wu |
| author_facet | Yijin Zhang Xiyuan Cao Xiaoyu Liu Li Liu Longsheng Wu Jian Sun Zhongying Xue Yi Jin Aimin Wu |
| author_sort | Yijin Zhang |
| collection | DOAJ |
| description | Mode overlapping promotes the capability in manipulating optical absorption. Based on such a mechanism, an all-dielectric metasurface has the capability of perfectly absorbing incident optical energy without the assistance of a mirror. Here, an array of thin germanium waveguide-like units is designed as a special absorber possessing some advantages by overlapping two localized resonant modes. Such a thin absorber can realize strong absorption even though the germanium material is of low loss at the <italic>O</italic> band. It is found that the absorption capability is about three times stronger than that of an unpatterned germanium film with the same thickness, and wideband strong absorption is obtained at the same time. The structure is continuous so that it can conduct carriers in photodetection. The suggested method would be heuristic in the photodetection area. |
| first_indexed | 2024-04-12T06:37:10Z |
| format | Article |
| id | doaj.art-b26a9ebf0cf94bd480187b11fa251d19 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-12T06:37:10Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-b26a9ebf0cf94bd480187b11fa251d192022-12-22T03:43:50ZengIEEEIEEE Photonics Journal1943-06552022-01-011441510.1109/JPHOT.2022.31901389832678Thin Germanium Waveguide-Array-Like Absorber Based on Localized ResonanceYijin Zhang0https://orcid.org/0000-0002-0223-480XXiyuan Cao1Xiaoyu Liu2https://orcid.org/0000-0002-9057-8740Li Liu3Longsheng Wu4Jian Sun5Zhongying Xue6Yi Jin7Aimin Wu8https://orcid.org/0000-0003-1867-126XState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaState Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaEngineering Research Center of Ultra-Precision Optical Manufacturing (Shanghai), Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaCentre for Optical and Electromagnetic Research and International Research Center for Advanced Photonics, College of Optical Science and Engineering, Zhejiang University, Hangzhou, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, ChinaMode overlapping promotes the capability in manipulating optical absorption. Based on such a mechanism, an all-dielectric metasurface has the capability of perfectly absorbing incident optical energy without the assistance of a mirror. Here, an array of thin germanium waveguide-like units is designed as a special absorber possessing some advantages by overlapping two localized resonant modes. Such a thin absorber can realize strong absorption even though the germanium material is of low loss at the <italic>O</italic> band. It is found that the absorption capability is about three times stronger than that of an unpatterned germanium film with the same thickness, and wideband strong absorption is obtained at the same time. The structure is continuous so that it can conduct carriers in photodetection. The suggested method would be heuristic in the photodetection area.https://ieeexplore.ieee.org/document/9832678/Perfect absorptionwaveguide-likedielectric metasurfacelocalized resonance |
| spellingShingle | Yijin Zhang Xiyuan Cao Xiaoyu Liu Li Liu Longsheng Wu Jian Sun Zhongying Xue Yi Jin Aimin Wu Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance IEEE Photonics Journal Perfect absorption waveguide-like dielectric metasurface localized resonance |
| title | Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance |
| title_full | Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance |
| title_fullStr | Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance |
| title_full_unstemmed | Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance |
| title_short | Thin Germanium Waveguide-Array-Like Absorber Based on Localized Resonance |
| title_sort | thin germanium waveguide array like absorber based on localized resonance |
| topic | Perfect absorption waveguide-like dielectric metasurface localized resonance |
| url | https://ieeexplore.ieee.org/document/9832678/ |
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