Non-Hermitian spectral changes in the scattering of partially coherent radiation by periodic structures
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 th...
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| Published in | Optics letters Vol. 44; no. 17; p. 4363 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
01.09.2019
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| Online Access | Get more information |
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| Summary: | 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 crucially on the loss/gain properties of the material, giving rise to unexpected and contrasting spectral diffraction profiles when compared to the Hermitian ones. |
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| ISSN: | 1539-4794 |
| DOI: | 10.1364/OL.44.004363 |