基于SiO_(2)、石墨烯和六方氮化硼异质结构的3-物体体系增强近场热辐射

Enhanced Near-Field Thermal Radiation of Three-Body System Based on SiO_(2), Graphene and Hexagonal Boron Nitride Heterostructure

研究了由块状二氧化硅、单层石墨烯和六方氮化硼薄膜堆叠形成的复合异质结构之间的近场热辐射。在两个半无限大平板结构即2-物体体系的基础上,将单层石墨烯和六方氮化硼复合异质结构的调制器置于两个半无限大平板之间构成三平板结构即3-物体体系,比较其与2-物体体系的近场辐射热流。结果表明,在相同体间距下3-物体体系的热流始终大于2-物体体系的热流,当d=10 nm时差距最大,深入探究发现可以通过调节该体系的相邻平板之间的距离、六方氮化硼薄膜的厚度以及石墨烯化学势来实现对其近场热辐射的调控。

Near-field thermal radiation is investigated in three-body system consisting of graphene, hBN and SiO_(2). The three-body system, different from two-body system based on SiO_(2)/hBN/graphene composite heterostructure, is obtained by introducing a modulator of graphene/hBN/graphene composite heterostructure. It is found that the heat flux of the three-body system is always higher than that of the two-body system and the largest increment is reached when the gap distance between adjacent slabs is 10 nm. The near-field thermal radiation can be modulated by changing the thickness of hBN, the gap distance between adjacent slabs and chemical potential of graphene in three-body system.