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arXiv · 0711.3427

Spin dynamics triggered by sub-terahertz magnetic field pulses

Zhao Wang·Matthäus Pietz·Arno Förster·Mihail I. Lepsa·Markus Münzenberg
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Abstract

Current pulses of up to 20 A and as short as 3 ps are generated by a low temperature grown GaAs (lt-GaAs) photoconductive switch and guided through a coplanar waveguide, resulting in a 0.6 Tesla terahertz (THz) magnetic field pulse. The pulse length is directly calibrated using photocurrent autocorrelation. Magnetic excitations in Fe microstructures are studied by time-resolved Kerr spectroscopy and compared with micromagnetic simulations. A response within less than 10 ps to the THz electromagnetic field pulse is found.

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Zhao Wang, Matthäus Pietz, Arno Förster, Mihail I. Lepsa, Markus Münzenberg. 2008-04-11. Spin dynamics triggered by sub-terahertz magnetic field pulses. https://doi.org/10.1063/1.2940734

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