The radiative transition of an emitter dipole is a fundamental process in many natural phenomena and can be modified by a dielectric environment. The Onsager–Böttcher (OB) approach predicts the experimental results in the frame of the local-field correction; however, there remains controversy when the macroscopic approximation is used. In this work, the main mechanism to explain the local-field correction arises dynamic coupling (DC). Although the OB and DC models consider the effect of the polarisation of the neighbouring atoms (NN) from the emitter and from the electric field of the light, respectively, we show that these effects arise naturally when the mixing of states from the interaction with the atoms in the surrounding medium is considered. Using perturbation theory, we show that the local field depends on the polarisability of the NN, and in contrast to the OB model, the concept of the polarisability of an emitter in transition is not necessary. Our expression is reduced to the OB model when the NN have spherical symmetry and do not absorb light.

发射极偶极子的辐射跃迁是许多自然现象中的基本过程，可以通过介电环境进行修改。Onsager-Böttcher (OB) 方法在局部场校正框架内预测实验结果；然而，当使用宏观近似时仍然存在争议。在这项工作中，解释局部场校正的主要机制是动态耦合（DC）。尽管 OB 和 DC 模型分别考虑了来自发射器和来自光电场的相邻原子 (NN) 偏振的影响，但我们表明，当与原子相互作用的状态混合时，这些效应自然出现。考虑周围介质中的原子。使用微扰理论，我们表明局部场取决于 NN 的极化率，与 OB 模型相反，发射器在过渡中的极化率的概念是不必要的。当 NN 具有球对称性且不吸收光时，我们的表达式被简化为 OB 模型。