Abstract

The singularity optical phenomena induced by broken symmetry within crystals have recently received widespread attention. In particular, the shear polaritons supported by low-symmetry crystal can improve the controllability of light propagation direction, making them have great potential for application in thermophotonics research. In this paper, we theoretically studied the near-field thermal radiation (NFTR) behavior of a three-body monoclinic crystal system. It is found that three-body systems can enhance NFTR over a wide frequency range by several orders of magnitude beyond the blackbody radiation limit, and the relative rotation of the middle body can play a role manipulation the NFTR between two low-symmetry crystal semi-infinite plates, in particular, the appearance of shear effect in low-symmetry crystals enhances the in-plane anisotropy of the twist-induced NFTR, providing extra approach for harnessing the NFTR of the system. We believe that the enhancement and control scheme of NFTR in the three-body systems can find potential applications in the fields of the realm of nanoscale thermal management.

中文翻译：

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三体低对称晶体中剪切极化子的可调近场辐射传热

摘要

晶体内对称性破缺引起的奇点光学现象最近受到广泛关注。特别是低对称性晶体支持的剪切极化子可以提高光传播方向的可控性，使其在热光子学研究中具有巨大的应用潜力。在本文中，我们从理论上研究了三体单斜晶系的近场热辐射（NFTR）行为。研究发现，三体系统可以在较宽的频率范围内将 NFTR 增强，超出黑体辐射极限几个数量级，并且中间体的相对旋转可以起到操纵两个低对称性晶体半体之间的 NFTR 的作用。特别是无限板，低对称性晶体中剪切效应的出现增强了扭曲引起的 NFTR 的面内各向异性，为利用系统的 NFTR 提供了额外的方法。我们相信三体系统中NFTR的增强和控制方案可以在纳米级热管理领域找到潜在的应用。