Analysis of Absorbing Periodic Structures Formed by Cylindrical Electromagnetic Black Holes

A 2D problem of electromagnetic plane wave scattering by 1D-periodic structures with cylindrical elements of electromagnetic black hole type arranged on a semi-infinite substrate is considered. Two algorithms corresponding to the cases of E- and H-polarization are developed on the basis of the hybri...

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Bibliographic Details
Published in:Technical physics 2021-02, Vol.66 (2), p.316-324
Main Authors: Chizhevskaya, Ya. I., Smolnikova, O. N., Skobelev, S. P.
Format: Article
Language:English
Subjects:
Absorption
Algorithms
Black holes
Classical and Continuum Physics
Electromagnetism
Periodic structures
Physics
Physics and Astronomy
Plane waves
Radiophysics
Refractivity
Substrates
Wave scattering
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Summary:A 2D problem of electromagnetic plane wave scattering by 1D-periodic structures with cylindrical elements of electromagnetic black hole type arranged on a semi-infinite substrate is considered. Two algorithms corresponding to the cases of E- and H-polarization are developed on the basis of the hybrid projection method with accounting for refractive index distributions in the black holes of different types. The algorithms are also generalized on the case of arrangement of the black holes on a perfectly conducting screen. A number of numerical results characterizing both the effectiveness of the algorithms themselves and the performance of the absorbing structures with black holes are presented. The characteristics of absorption in the indicated structures are compared to the similar characteristics corresponding to the structures with wedge-shaped elements.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784221020079