Time-resolved magnetization-induced second-harmonic generation from the Ni„110... surface
نویسندگان
چکیده
Relaxation processes on the picosecond and subpicosecond time scale after optical excitation have been studied by time-resolved magnetization-induced second-harmonic generation from ferromagnetic nickel. A fast drop of the second-harmonic intensity and the Kerr-signal within 300 fs after optical excitation has been observed which is followed by a partial recovery within a few picoseconds. We show that the fast initial drop cannot be unambiguously attributed to an ultrafast decrease of the magnetization.
منابع مشابه
Strong surface state effects in nonlinear magneto-optical response of Ni(110).
Spectroscopic magnetization-induced optical second harmonic generation (MSHG) measurements from a clean Ni(110) surface reveal strong resonance effects near 2.7 eV that can be attributed to the presence of an empty surface state. The good agreement with model calculations shows the potential of MSHG to probe spin-polarized interface band structures.
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