Broadband and Energy-Concentrated Absorber Based on Hemispherical-Embedded Structure

doi:10.1002/adpr.202200301

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	Broadband and Energy-Concentrated Absorber Based on Hemispherical-Embedded Structure
	Z. Wu, Z. Liang, X. Shi, F. Yang, R. Dai, E. Hou, W. Sun, Z. Qin, W. Xin and H. Xu
	2023
发表期刊	Advanced Photonics Research
ISSN	26999293
卷号	4 期号:3
摘要	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. © 2022 The Authors. Advanced Photonics Research published by Wiley-VCH GmbH.
DOI	10.1002/adpr.202200301
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68036
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Z. Wu, Z. Liang, X. Shi, F. Yang, R. Dai, E. Hou, W. Sun, Z. Qin, W. Xin and H. Xu. Broadband and Energy-Concentrated Absorber Based on Hemispherical-Embedded Structure[J]. Advanced Photonics Research,2023,4(3).
APA	Z. Wu, Z. Liang, X. Shi, F. Yang, R. Dai, E. Hou, W. Sun, Z. Qin, W. Xin and H. Xu.(2023).Broadband and Energy-Concentrated Absorber Based on Hemispherical-Embedded Structure.Advanced Photonics Research,4(3).
MLA	Z. Wu, Z. Liang, X. Shi, F. Yang, R. Dai, E. Hou, W. Sun, Z. Qin, W. Xin and H. Xu."Broadband and Energy-Concentrated Absorber Based on Hemispherical-Embedded Structure".Advanced Photonics Research 4.3(2023).

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