It is fortunate that the garnet films that support dipolar spin wave propagation are also transparent to infrared light in the range of wavelengths between 1 and 5μm. This includes wavelengths of 1.3 and 1.5 μm, which are of particular interest for optical fiber communication systems. Since a single film can be used simultaneously as a waveguide for optical and spin wave modes, interactions between these modes can be exploited for devices such as microwave spectrum analyzers, optical frequency shifters, tunable optical filters, and optical beam deflectors.
KeywordsSpin Wave Faraday Rotation Mode Conversion Magnetostatic Wave Mode Dispersion Relation
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