Opt Lett. 2023 Feb 1;48(3):723-726. doi: 10.1364/OL.480166.
We numerically investigate the near-field radiative heat transfer (NFRHT) between a graphene/SiC core-shell (GSCS) nanoparticle and a hexagonal boron nitride (hBN) plate. By applying a compressive strain to the hBN plate, its hyperbolic modes can be tuned. Consequently, the hyperbolic phonon polaritons (HPPs) of hBN and the high-frequency localized surface resonance (LSR) of GSCS nanoparticle can couple and decouple, thus allowing for the active control of NFRHT. Furthermore, we predict that, combining with the effect of the chemical potential of graphene shell on NFRHT, a thermal rectification ratio of up to 13.6 can be achieved. This work enriches the phonon-polariton coupling mechanism and also facilitates dynamic thermal management at the nanoscale.
我们通过数值模拟的方法研究了石墨烯/碳化硅核壳（GSCS）纳米颗粒与六方氮化硼（hBN）板之间的近场辐射热传递（NFRHT）。通过对 hBN 板施加压缩应变，可以调节其双曲模式。因此，hBN 的双曲声子极化激元和 GSCS 纳米颗粒的高频局域表面共振（LSR）可以耦合和去耦合，从而实现 NFRHT 的主动控制。此外，我们预测，结合石墨烯壳的化学势对 NFRHT 的影响，可实现高达 13.6 的热整流比。这项工作丰富了声子极化激元耦合机制，并为纳米尺度上的动态热管理提供了便利。
