石墨烯与hBN周期性堆叠的调制器增强近场热辐射

Enhancement of Near-Field Thermal Radiation by Modulator Based on Multilayer Graphene-hBN Heterostructures

本文在近场辐射传热装置的发射端与接收端之间引入一种基于石墨烯(Graphene)和六方氮化硼(hexagonal boron nitride,简记为h BN)薄膜交替堆叠的多层结构的调制器,与石墨烯覆盖的单层hBN结构(G-hBN-G)相比可以在不改变发射端和接收端参数的情况下增强近场热辐射,经计算在N(调制器中hBN薄膜层数)=16时近场辐射热流增强了2.4×10^(4)W/m^(2)。石墨烯覆盖的多层hBN结构与G-hBN-G结构的近场辐射热流随着调制器厚度的增加均逐渐减小。本研究的结果有助于控制近场辐射的热传递,理解石墨烯覆盖的多层hBN结构的调制器对3-物体体系近场热辐射的调控特性,为有关热辐射产品的研发和制造提供理论基础。

The three-body system is obtained by introducing a modulator based on multilayer graphene-hBN heterostructures between the transmitter and receiver of the nearfield radiation heat transfer device which can enhance the near-field thermal radiation without changing the parameters of the transmitter and receiver.The heat flux of the multilayer hBN heterostructures and the G-hBN G heterostructure decreases with the increase of the thickness of the modulator.When the thickness of the modulator is equal and other physical parameters are constant,it is found that the heat flux of the multilayer hBN heterostructures is always larger than that of the G-hBN G heterostructure with the increase of N(the number of hexagonal boron nitride layers in modulator).This study is helpful to understand the regulation of near-field thermal radiation in three-body system,and provides a theoretical basis for the application of three-body system in the experimental design and manufacture of thermal radiation devices.