Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2021-06-09 , DOI: 10.1016/j.jqsrt.2021.107794 Xiaohu Wu , Ruiyi Liu , Haiyan Yu , Biyuan Wu
Kirchhoff's law plays a vital role in radiation heat transfer, which has been recently generalized to hold for both reciprocal and nonreciprocal materials. However, the verification of the generalized Kirchhoff's law for nonreciprocal materials in experiment has not been reported. Previous proposed structures could only obtain strong nonreciprocal radiation at large angles, which were not favorable in experiment. Here, we proposed magnetophotonic crystal to realize strong nonreciprocal radiation at small angles. The numerical results show that strong nonreciprocal radiation can be obtained at angle of incidence of 30o, which is much smaller than the typical angle of 60°. The distribution of magnetic field is used to reveal the mechanism, and it indicates that the enhanced nonreciprocity is attributed to the excitation of Tamm plasmon polaritons. We believe such magnetophotonic crystal is promising in verifying the Kirchhoff's law for nonreciprocal materials.
中文翻译:
磁光子晶体中的强非互易辐射
基尔霍夫定律在辐射传热中起着至关重要的作用,最近已将其推广到互易和非互易材料。然而,对于非互易材料的广义基尔霍夫定律在实验中的验证尚未见报道。先前提出的结构只能在大角度获得强非互易辐射,这在实验中是不利的。在这里,我们提出了磁光子晶体来实现小角度的强非互易辐射。数值结果表明,强不可逆辐射可以在30的入射角来获得ö,这远小于 60° 的典型角度。磁场的分布被用来揭示机制,它表明增强的非互易性归因于Tamm等离子体激元的激发。我们相信这种磁光子晶体在验证非互易材料的基尔霍夫定律方面很有前途。