FROM MAGNETO-OPTICS TO ULTRAFAST MANIPULATION OF MAGNETISM
Journal Title: Journal of Science And Arts - Year 2011, Vol 16, Issue 3
Abstract
The purpose of these lectures is to summarize the recent progress in laser-induced magnetization dynamics. Circularly polarized pulses are shown to act as strong transient magnetic field pulses originating from the non-absorptive inverse Faraday effect. An all-optical scheme of excitation and detection of different antiferromagnetic resonance modes with frequencies of several hundreds GHz is demonstrated, along with non-thermal excitation of phase transitions. On the other hand, in ferrimagnetic metals the magnetization could be reversed in a reproducible manner by single 40 fs circularly polarized laser pulses, without any applied magnetic field. The angular momentum of the magnetic system is shown to play a crucial role in this process. All these findings open new insights into the understanding of ultrafast magnetic excitation and, considering recent progress in the development of compact ultrafast lasers, may provide new prospects for applications of ultrafast opto-magnetic phenomena in magnetic storage and information processing technology.
Authors and Affiliations
ANDREI KIRILYUK
Keywords
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