The intrinsic optical response of a scattering object is known to be modified when it is placed on a substrate. Moreover, the total extinction through ohmic losses and Rayleigh scattering is basically dependent on the reversal of the direction of the excitation wave. Considering, as stated by the generalized optical theorem, that the total extinction of the incident wave is shared among the extinction of the waves transmitted and reflected by the non-absorbing substrate, we show that only the contribution of the transmitted wave is insensitive to the direction of illumination, by analogy with the textbook case of transmission through a planar stratified medium. This property was recently confirmed experimentally [J. Phys. Chem. C 123, 15217 (2019)] and is established here on theoretical grounds in the frameworks of the Green's function integral equation method and the Lorentz reciprocity theorem. Some of its limitations with regard to the incidence and the polarization of the excitation wave are also discussed in detail.

中文翻译：

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照明方向对靠近电介质界面的散射体对消光的影响

已知将散射物体放置在基板上时会改变其固有的光学响应。此外，通过欧姆损耗和瑞利散射的总消光基本上取决于激励波方向的反转。如广义光学定理所述，考虑到入射波的总消光是在非吸收性基底透射和反射的波的消光之间共享的，我们表明只有透射波的贡献对光的不敏感类似于教科书中通过平面分层介质传输的情况。最近通过实验证实了这种性质[ J. 化学 C 123，15217（2019）]，并在此基础上在格林函数积分方程方法和洛伦兹互易定理的框架内建立。还详细讨论了其在激发波的入射和极化方面的一些局限性。