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Terahertz emission via ultrashort-pulse excitation of magnetic metal films

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Abstract

We observe terahertz emission by optical rectification of an intense 1.5-eV, 50-fs pulse in single-crystal iron thin films grown by molecular beam epitaxy. The azimuthal dependence of the emission indicates the presence of a magnetic nonlinearity and a nonmagnetic surface nonlinearity.

© 2004 Optical Society of America

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