Chen Lei, Song Jinlin, Jin Lin, Yao Xinjie, Zhao Hailong, Cheng Qiang
School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Langmuir. 2023 Sep 12;39(36):12817-12825. doi: 10.1021/acs.langmuir.3c01662. Epub 2023 Sep 1.
As an allotrope of phosphorus and a promising 2D semiconductor, black phosphorus (BP) exhibits in-plane anisotropy along its armchair and zigzag crystal directions, allowing for efficient regulation of near-field radiative heat transfer (NFRHT). In this work, we investigate the NFRHT between two multilayer BP/hBN heterostructures and theoretically demonstrate that thermal regulation can be realized by tuning the electron density and rotation angle of BP. Results show that a larger electron density leads to the coupling of anisotropic surface plasmon polaritons (SPPs) of BP with hyperbolic modes of hBN, and rotation of BP changes the anisotropic characteristic of coupled SPPs on both sides, whereby a regulation ratio of 5.8 can be obtained. We also analyze the effects of period number, hBN layer thickness, and topmost-layer material on the NFRHT. This work may be beneficial for efficient nanoscale thermal management and physical understanding of radiative heat transfer based on anisotropic SPPs.
作为磷的一种同素异形体和一种有前景的二维半导体，黑磷（BP）沿其扶手椅型和锯齿型晶体方向表现出平面内各向异性，这使得近场辐射热传递（NFRHT）能够得到有效调控。在这项工作中，我们研究了两个多层BP/hBN异质结构之间的NFRHT，并从理论上证明了可以通过调节BP的电子密度和旋转角度来实现热调控。结果表明，更大的电子密度会导致BP的各向异性表面等离激元极化激元（SPP）与hBN的双曲线模式发生耦合，而BP的旋转会改变两侧耦合SPP的各向异性特性，从而可获得5.8的调控比。我们还分析了周期数、hBN层厚度和最顶层材料对NFRHT的影响。这项工作可能有助于实现高效的纳米级热管理以及对基于各向异性SPP的辐射热传递的物理理解。
