Coherent control of magnetization precession in ferromagnetic semiconductor (Ga,Mn)As
E. Rozkotova, P. Nemec, N. Tesarova, P. Maly, V. Novak, K. Olejnik, M., Cukr, and T. Jungwirth
TL;DR
This paper demonstrates the coherent optical control of magnetization precession in ferromagnetic (Ga,Mn)As using ultrashort laser pulses, revealing insights into the collective Mn-moment behavior and magneto-optical signals.
Contribution
It introduces a method for controlling magnetization precession in (Ga,Mn)As with ultrashort laser pulses and analyzes the underlying magnetic dynamics.
Findings
Successful coherent control of magnetization precession using two laser pulses
Identification of collective Mn-moment contributions to Kerr rotation
Observation of additional magneto-optical effects not related to magnetization dynamics
Abstract
We report single-color, time resolved magneto-optical measurements in ferromagnetic semiconductor (Ga,Mn)As. We demonstrate coherent optical control of the magnetization precession by applying two successive ultrashort laser pulses. The magnetic field and temperature dependent experiments reveal the collective Mn-moment nature of the oscillatory part of the time-dependent Kerr rotation, as well as contributions to the magneto-optical signal that are not connected with the magnetization dynamics.
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