Abstract
A Faraday-effect system to measure small patterned areas with about a 6-μm sized laser spot was constructed. We found that highly accurate Faraday measurements were possible for a patterned array of nanodots and also obtained the dependence of the Faraday effect on the angle of the sample. Two lasers with wavelengths of 633 nm and 690 nm were close to the local surface plasmon resonance (LSPR) wavelengths of the noble material of Au. A nanodot array, consisting of magnetic materials made up of a Co/Pt multilayer, sandwiched by Au, that was not more than 100 nm in diameter, was fabricated, and the optical and magneto-optical properties were investigated.
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