دورية أكاديمية
Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure
| العنوان: | Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure |
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| المؤلفون: | Zhe Wu, Zhongzhu Liang, Xiaoyan Shi, Fuming Yang, Rui Dai, Enzhu Hou, Wenwen Sun, Zheng Qin, Wei Xin, Haiyang Xu |
| المصدر: | Advanced Photonics Research, Vol 4, Iss 3, Pp n/a-n/a (2023) |
| بيانات النشر: | Wiley-VCH, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Applied optics. Photonics LCC:Optics. Light |
| مصطلحات موضوعية: | broadband absorbers, midwave infrared, near-wave infrared, spatial energy concentrated, wide-angle absorbers, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467 |
| الوصف: | Spatially concentrated absorption is able to form local hotspots and helps to generate hot electrons with higher energy than free electrons, which can be used to improve the performance of hot electron devices. Herein, a broadband, wide‐angle, and highly concentrated metamaterial absorber operating in near‐infrared and midinfrared bands is proposed. The absorptivity of the proposed absorber exceeds 90% in the wavelength range of 2.0–5.4 μm, and the average absorptivity at 2.0–5.4 μm reaches 93.5%. Moreover, the absorber can highly concentrate the energy of the incident light on a point on the bottom surface of the device; the area with concentrated energy only accounts for 1.4% of the total area of the bottom, thus forming a hotspot. Meanwhile, the absorber can still maintain an average absorptivity of more than 85% when the incident light angle of various polarization directions reaches 60°. These characteristics enable the device to provide a solution to improve the performance of hot electrons, energy collection, and imaging devices. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2699-9293 20220030 |
| Relation: | https://doaj.org/toc/2699-9293 |
| DOI: | 10.1002/adpr.202200301 |
| URL الوصول: | https://doaj.org/article/36e6b1a741c94032a7b6cf00de7c2260 |
| رقم الأكسشن: | edsdoj.36e6b1a741c94032a7b6cf00de7c2260 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26999293 20220030 |
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| DOI: | 10.1002/adpr.202200301 |