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Properties of backward electromagnetic waves and negative reflection in ferrite films

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Institute of Radio Engineering and Electronics, Russian Academy of Sciences, pl. Vvedenskogo 1, Fryazino, Moscow Region, 141120, Russian Federation

For a backward electromagnetic wave (magnetostatic wave) in a ferrite film, reflection from a perfect mirror formed by the straight edge of the film is investigated experimentally and theoretically. It is found that when the incident wave is collinear (the group velocity vector and the wave vector have opposite directions), negative reflection occurs at any angle of incidence, i.e., the incident and reflected beams are on the same side of the normal to the boundary. It is discovered that a noncollinear backward wave is nonreciprocal in the sense that its energy can be localized both near the surface and in the middle of the film. This property, previously observed only for surface magnetostatic waves, provides both the efficiency of generating and receiving the wave and the possibility of observing the reflected beam. A situation is realized where wave reflection results in two reflected beams. The properties of backward electromagnetic waves propagating in ferrite films are briefly analyzed.

Text can be downloaded in Russian. English translation is available on IOP Science.
PACS: 42.25.−p, 78.20.Ci, 78.66.Bz (all)
DOI: 10.1070/PU2006v049n04ABEH005807
URL: https://ufn.ru/en/articles/2006/4/d/
Citation: Vashkovsky A V, Lock E H "Properties of backward electromagnetic waves and negative reflection in ferrite films" Phys. Usp. 49 389–399 (2006)
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Оригинал: Вашковский А В, Локк Э Г «Свойства обратных электромагнитных волн и возникновение отрицательного отражения в ферритовых пленках» УФН 176 403–414 (2006); DOI: 10.3367/UFNr.0176.200604d.0403

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