热辐射递减的超材料近红外超宽带吸收器

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-06-27 DOI:10.1016/j.ijthermalsci.2024.109237

Liqun Liu , Bo Wang , Shanwen Zhang

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引用次数: 0

摘要

本研究旨在提出一种超宽带超材料吸收器，用于红外探测和热发射器应用。尽管对超材料吸收体进行了大量研究，但实现超宽带吸收仍然是一项挑战。我们引入了具有横向磁极化的双金方阵，并将其与抗反射（砷化镓）层和金属绝缘体（金-Al2O3）配置相结合。吸收器在 0.63 μm 至 2.90 μm 之间的吸收率超过 90%，平均吸收率和有效吸收率分别为 94.60% 和 94.68%。通过阻抗匹配理论，我们验证了吸收器的性能，分析了电场分布以解释其机理，并评估了实际应用的制造公差。我们的研究结果表明，这种超材料吸收器在很宽的光谱范围内都具有很强的性能，包括对入射角度不敏感，在 20-60° 范围内的吸收率超过 80%，这凸显了它在红外探测和热发射器方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Metamaterial ultra-broadband absorber in near-infrared region with decreasing thermal emission

This study is aimed to present an ultra-broadband metamaterial absorber for infrared detection and thermal emitter applications. Despite numerous studies on metamaterial absorbers, achieving ultra-broadband absorption remains a challenge. We introduce a dual-gold square array with transverse magnetic polarization and combine it with an anti-reflective (GaAs) layer and metal-insulator (gold-Al₂O₃) configurations. The absorber achieves over 90 % absorption between 0.63 μm and 2.90 μm, with average and effective absorptions at 94.60 % and 94.68 %, respectively. Through impedance matching theory, we validate the performance of the absorber, analyze electric field distributions to explain its mechanism, and assess manufacturing tolerance for practical application viability. Our findings reveal robust performance of the metamaterial absorber across a wide spectral range, including insensitivity to incidence angles, with absorption over 80 % in 20–60°, highlighting its potential in the infrared detection and the thermal emitter.

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.