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Intense terahertz transients coherently control magnon oscillations in antiferromagnetic NiO. The magnetic component of the light field directly couples to the spins via Zeeman interaction. 8-fs probe pulses sample the ultrafast dynamics via Faraday rotation.
Widely tunable phase-locked THz transients with electric and magnetic fields exceeding 100 MV/cm are generated by a novel table-top laser. These pulses are able to drive non-perturbative optical nonlinearities by electric and magnetic coupling.
We report on two investigations demonstrating that terahertz spectroscopy is a powerful tool to study the orbital and spin dynamics of electrons in magnetically ordered solids. First, we show that the terahertz pulse emitted from a photo-excited ferromagnetic Fe film is highly sensitive to the motion of spin-polarized electrons along the film interfaces. Second, the magnetic field of an intense terahertz...
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