Spin dynamics triggered by sub-terahertz magnetic field pulses

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.

12 pages, 4 figures, submitted to J. Appl. Phys, changes made with regard to review process

References in corpus (3)

• Quasi ballistic magnetization reversal
• Connecting the timescales in picosecond remagnetization experiments
• Activation of additional energy dissipation processes in the magnetization dynamics of epitaxial chromium dioxide films

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• Magnetic pulses enable multidimensional optical spectroscopy of dark states