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Rigorous Analysis of Grazing-Angle Scattering of Electromagnetic Waves in Periodic Gratings
Gramotnev, D. K. and Nieminen, T. A. (2003-01-01) Rigorous Analysis of Grazing-Angle Scattering of Electromagnetic Waves in Periodic Gratings. Optics Communications, 219 1-6: 33-48.
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paper.pdf |
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| Author(s) |
Gramotnev, D. K.
Nieminen, T. A.
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| Title |
Rigorous Analysis of Grazing-Angle Scattering of Electromagnetic Waves in Periodic Gratings
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| Journal name |
Optics Communications
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| Publication date |
2003-01-01
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| Volume number |
219
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| Issue number |
1-6
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| ISSN |
0030-4018
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| Start page |
33
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| End page |
48
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| Total pages |
16
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| Editor(s) |
F. Abeles
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| Place of publication |
Netherlands
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| Publisher |
Elsevier BV, North Holland
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| Collection year |
2003
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| Language |
eng
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| Subject |
240401 Optics and Opto-electronic Physics
C1
780102 Physical sciences
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| Abstract |
Grazing-angle scattering (GAS) is a type of Bragg scattering of waves in slanted non-uniform periodic gratings, when the diffracted order satisfying the Bragg condition propagates at a grazing angle with respect to the boundaries of a slab-like grating. Rigorous analysis of GAS of bulk TE electromagnetic waves is undertaken in holographic gratings by means of the enhanced T-matrix algorithm. A comparison of the rigorous and the previously developed approximate theories of GAS is carried out. A complex pattern of numerous previously unknown resonances is discovered and analysed in detail for gratings with large amplitude, for which the approximate theory fails. These resonances are associated not only with the geometry of GAS, but are also typical for wide transmitting gratings. Their dependence on grating amplitude, angles of incidence and scattering, and grating width is investigated numerically. Physical interpretation of the predicted resonances is linked to the existence and the resonant generation of special new eigenmodes of slanted gratings. Main properties of these modes and their field structure are discussed.
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| Keyword(s) |
gratings
grazing-angle scattering
amplitude
periodic gratings
scattering
rigorous coupled wave theory
bulk optical waves
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| Additional Notes |
Originally published as D. K. Gramotnev and T. A. Nieminen (2003) Rigorous analysis of grazing-angle scattering of electromagnetic waves in periodic gratings, Optics Communications, 219 (1-6): 33-48. Copyright (2003) Elsevier. All rights reserved.
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