非互易广角和窄带热发射器

IF 10 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jianshu Wang , Kezhang Shi , Xiaobo Xing
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引用次数: 0

摘要

非互易热辐射允许违反基尔霍夫定律,因为同一角度的光谱定向发射率和吸收率可能不同。先前的研究已经阐明,某些光学共振模式有助于放大特定角度或波长的非互易性。然而,如何实现具有广角覆盖和窄带特性的非互易热辐射,是一个基本而又具有挑战性的问题。在这项工作中,我们展示了一种非互易热辐射器,它通过磁光材料组成的周期性结构实现了广角和窄带。在外部磁场(B = 3 T 或 1 T)的作用下,6.52 μm 或 7.18 μm 处的磁光局部共振模式产生的明显非互易性促进了发射率和吸收率在 0°-89° 附近的宽角度范围内的明显差异。在结构参数波动 ±5% 的情况下,证明了广角和窄带非互易热辐射的稳健性。此外,还研究了方位角 ϕ 在 0° 至 360° 范围内的非折射性能。这项研究成果有望应用于热管理、定向热伪装、高效热光电系统等领域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonreciprocal wide-angle and narrowband thermal emitter

Nonreciprocal thermal radiation allows the violation of Kirchhoff's law, as the spectral directional emissivity and absorptivity at the same angle can be different. Prior research has elucidated that certain optical resonance modes facilitate amplification of nonreciprocity at specific angles or wavelengths. However, achieving nonreciprocal thermal radiation with both wide-angle coverage and narrowband characteristics poses a fundamental yet challenging problem. In this work, we demonstrate a nonreciprocal thermal emitter that achieves both wide-angle and narrowband through a periodic structure composed of magneto-optical materials. With an external magnetic field (B = 3 T or 1 T), the pronounced nonreciprocity arising from the magneto-optical localized resonance mode at 6.52 μm or 7.18 μm facilitates a distinct difference between the emissivity and absorptivity across a wide angular range from near 0°–89°. The robustness of the wide-angle and narrowband nonreciprocal thermal radiation is demonstrated with ±5 % fluctuations in structural parameters. The performance of the nonreciprocity with azimuthal angle ϕ ranging from 0° to 360° is also investigated. This work holds promising potential for applications in thermal management, directional thermal camouflage, high-efficiency thermophotovoltaic systems, and more.

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来源期刊
Materials Today Physics
Materials Today Physics Materials Science-General Materials Science
CiteScore
14.00
自引率
7.80%
发文量
284
审稿时长
15 days
期刊介绍: Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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