Modulation of radiative heat transfer by higher-order topological phonon polaritons,Physical Review B

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Modulation of radiative heat transfer by higher-order topological phonon polaritons
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-11 , DOI: 10.1103/physrevb.110.115419
Z. Gong ₁ , B. X. Wang ₂ , C. Y. Zhao ₁

Affiliation

Topological optical states are promising in waveguiding, sensing, and information processing which are localized over the boundaries and robustly protected by the band topology. Topological phonon polaritons (TPhPs), as a special type of topological optical states, have been shown to play a vital role in modulating radiative heat transfer in many-particle systems. In this paper, we propose subwavelength lattices composed of identical SiC nanoparticles (NPs) which support phonon polaritons to mimic the 2D Su-Schrieffer-Heeger (SSH) model. By using the coupled-dipole model and taking all the near- and far-field dipole-dipole interactions into account, we numerically calculate the band structures of the NP arrays under periodic boundary conditions (PBCs) and study the topological properties of the NP arrays characterized by their 2D Zak phases. Subsequently, we confirm the existence of edge states and high-order corner states in the topologically nontrivial 2D SSH lattices under open boundary conditions (OBCs), which are protected by the nonzero 2D Zak phases and consistent with the bulk-edge-corner correspondence. The radiative heat transfer between certain NPs is calculated based on many-body radiative heat transfer theory. We demonstrate that these high-order TPhPs can considerably modulate long-range radiative heat transport by constructing the topological “heat guiding” systems made of NP arrays with different boundary conditions. Moreover, by decomposing the radiative heat flux into two parts according to the polarization directions of dipoles, we find that the high-order TPhPs play different roles in the in-plane and out-of-plane components. We further show the modulation effect can robustly exist in the topologically nontrivial lattice by introducing defects and disorders. Our study provides an in-depth understanding on the near-field radiative heat transfer in many-particle systems with high-order topological properties.

中文翻译：

高阶拓扑声子极化子对辐射传热的调制

拓扑光学态在波导、传感和信息处理方面很有前景，它们位于边界之上并受到能带拓扑的稳健保护。拓扑声子极化子（TPhP）作为一种特殊类型的拓扑光学态，已被证明在调节多粒子系统中的辐射传热方面发挥着至关重要的作用。在本文中，我们提出了由相同的 SiC 纳米颗粒 (NP) 组成的亚波长晶格，该晶格支持声子极化激元以模拟 2D Su-Schrieffer-Heeger (SSH) 模型。通过使用耦合偶极子模型并考虑所有近场和远场偶极子-偶极子相互作用，我们数值计算了周期性边界条件（PBC）下NP阵列的能带结构并研究了NP阵列的拓扑性质其特征在于它们的 2D Zak 相。随后，我们确认了开放边界条件（OBC）下拓扑非平凡二维 SSH 晶格中边缘态和高阶角态的存在，它们受到非零二维 Zak 相的保护，并且与体边角对应关系一致。某些纳米颗粒之间的辐射传热是基于多体辐射传热理论计算的。我们证明，这些高阶 TPhP 可以通过构建由具有不同边界条件的 NP 阵列组成的拓扑“热引导”系统来显着调节远程辐射热传输。此外，通过根据偶极子的偏振方向将辐射热通量分解为两部分，我们发现高阶TPhPs在面内和面外分量中发挥不同的作用。我们进一步证明，通过引入缺陷和紊乱，调制效应可以稳健地存在于拓扑非平凡晶格中。我们的研究提供了对具有高阶拓扑特性的多粒子系统中的近场辐射传热的深入理解。

更新日期：2024-09-11

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