磁光子多层膜中耦合光学Tamm态实现双带非互易热辐射
Dual-band nonreciprocal thermal radiation by coupling optical Tamm states in magnetophotonic multilayers
AI总结：
本文提出一种基于一维磁光子晶体异质结构的双带非互易无光刻热发射器，利用磁光材料非互易性与光学Tamm态耦合效应，在3 T磁场和56度入射角下实现15.337 um和15.731 um波长的双带非互易热辐射。
摘要：
基尔霍夫定律是热辐射中最基本的定律之一。违背传统基尔霍夫定律为提高能量转换效率提供了机会。人们已经提出了各种微结构来实现单带非互易热发射器。然而，双带非互易热发射器仍鲜有研究。在本文中，我们将磁光材料引入到一个级联的一维（1-D）磁光子晶体（MPC）异质结构中，该结构由两个1-D MPC和一个金属层组成。在磁光材料的非互易性和两个光学Tamm态（OTSs）耦合效应的辅助下，实现了一种双带非互易的无光刻热发射器。当外加磁场为3 T且入射角为56度时，该发射器在15.337 um和15.731 um波长处表现出强烈的双带非互易辐射。此外，还计算了磁场分布，以证实双带非互易辐射源于两个OTSs之间的耦合效应。我们的工作可能为构建双带和多带非互易热发射器铺平道路。
英文摘要：
Kirchhoff s law is one of the most fundamental law in thermal radiation. The violation of traditional Kirchhoff s law provides opportunities for higher energy conversion efficiency. Various micro-structures have been proposed to realize single-band nonreciprocal thermal emitters. However, dual-band nonreciprocal thermal emitters remain barely investigated. In this paper, we introduce magneto-optical material into a cascading one-dimensional (1-D) magnetophotonic crystal (MPC) heterostructure composed of two 1-D MPCs and a metal layer. Assisted by the nonreciprocity of the magneto-optical material and the coupling effect of two optical Tamm states (OTSs), a dual-band nonreciprocal lithography-free thermal emitter is achieved. The emitter exhibits strong dual-band nonreciprocal radiation at the wavelengths of 15.337 um and 15.731 um when the external magnetic field is 3 T and the angle of incidence is 56 degree. Besides, the magnetic field distribution is also calculated to confirm that the dual-band nonreciprocal radiation originates from the coupling effect between two OTSs. Our work may pave the way for constructing dual-band and multi-band nonreciprocal thermal emitters.
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