辐射场的光散射：光学介质模拟
Light scattering by radiation fields: the optical medium analogy
摘要：
本文在广义相对论的框架内，发展了由精确引力平面波或精确电磁波产生的辐射场的光学介质类比。在前一种情况下，相应背景场的等效介质是非均匀各向异性的，而在后一种情况下，相应背景场的等效介质是非均匀各向同性的。假设相互作用区夹在两个平坦的时空区域之间，光线沿直线传播，研究了光散射的特征。普通波动光学的标准工具被用来研究由于与辐射场的相互作用而导致的光子路径的偏转，从而允许与不同背景场相关联的等效介质的光学性质之间的比较。
英文摘要：
The optical medium analogy of a radiation field generated by either an exact gravitational plane wave or an exact electromagnetic wave in the framework of general relativity is developed. The equivalent medium of the associated background field is inhomogeneous and anisotropic in the former case, whereas it is inhomogeneous but isotropic in the latter. The features of light scattering are investigated by assuming the interaction region to be sandwiched between two flat spacetime regions, where light rays propagate along straight lines. Standard tools of ordinary wave optics are used to study the deflection of photon paths due to the interaction with the radiation fields, allowing for a comparison between the optical properties of the equivalent media associated with the different background fields.
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