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Non-Hermitian spectral changes in the scattering of partially coherent radiation by periodic structures

机译:通过周期性结构散射部分相干辐射的非密封频谱变化

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The physical aspects of partially coherent radiation interacting with deterministic non-Hermitian periodic materials remain largely unexplored in the statistical optics literature. Here, we consider the scattering of partially coherent radiation by a deterministic periodic medium, symmetric under the simultaneous transformations of parity inversion and time reversal, i.e., a parity-time-symmetric periodic medium. Taking into account light fluctuations, one is able to describe the spectrum changes on propagation and the influence of the coherence-driven angular divergence effect. The far-field spectral density profile is found to depend crudally on the loss/gain properties of the material, giving rise to unexpected and contrasting spectral diffraction profiles when compared to the Hermitian ones. (C) 2019 Optical Society of America
机译:与确定性非封闭式期间材料的部分相干辐射相互作用的物理方面在统计光学文献中仍然在很大程度上是未开发的。 这里,我们考虑通过确定性周期性介质,在奇偶校验反演和时间反转的同时转换下对称的偏离辐射的散射,即奇偶校正时间对称的周期性介质。 考虑到光波波动,人们能够描述传播的频谱和相干触发角分歧效应的影响。 发现远场光谱密度曲线粗略地依赖于材料的损耗/增益性质,从密封师时产生意外和对比的光谱衍射型材。 (c)2019年光学学会

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