辐射转移中的邻近效应
Proximity Effects in Radiative Transfer
摘要：
虽然近场辐射转移对两个平面物体之间的间隙的依赖性已经很好地理解，但弯曲物体之间的间隙仍然不清楚。我们表明，基于分析的表面极化激元介导的两个球体之间的相等半径$R$和最小间隙$d$的辐射转移，近场辐射转移尺度为$R/d$作为$d/R \rightarrow 0$和作为$\ln(R/d)$为较大的值的$d/R$的远场极限。我们提出了一种修正形式的邻近近似来预测近场辐射转移之间的弯曲物体的平面表面之间的辐射转移的模拟。
英文摘要：
Though the dependence of near-field radiative transfer on the gap between two planar objects is well understood, that between curved objects is still unclear. We show, based on the analysis of the surface polariton mediated radiative transfer between two spheres of equal radii $R$ and minimum gap $d$, that the near--field radiative transfer scales as $R/d$ as $d/R \rightarrow 0$ and as $\ln(R/d)$ for larger values of $d/R$ up to the far--field limit. We propose a modified form of the proximity approximation to predict near--field radiative transfer between curved objects from simulations of radiative transfer between planar surfaces.
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