2007/11/30 by Zhao Wang, Matthäus Pietz, Arno Förster +3
Engineering · Physics and Astronomy · #Laser-Matter Interactions and Applications #Magnetic properties of thin films #Pulsed Power Technology Applications #cond-mat.other
paper · pdf · doi:10.1063/1.2940734
published as J. Appl. Phys. 103, 123905 (2008) · 12 pages, 4 figures, submitted to J. Appl. Phys, changes made with regard to review process
arxiv created 2008/04/11 · openalex publication_date 2008/06/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Current pulses of up to 20 A and as short as 3 ps are generated by a low-temperature-grown GaAs photoconductive switch and guided through a coplanar waveguide, resulting in a 0.6 T subterahertz magnetic field pulse. The pulse length is directly calibrated using photocurrent autocorrelation. Magnetic excitations in Fe microstructures are studied by time-resolved Kerr spectroscopy. An ultrafast response time (within less than 10 ps of the magnetization) to the subterahertz electromagnetic field pulse is shown.