TY - JOUR
T1 - Ultrafast magneto-optics in ferromagnetic III-V semiconductors
AU - Wang, Jigang
AU - Sun, Chanjuan
AU - Hashimoto, Yusuke
AU - Kono, Junichiro
AU - Khodaparast, Giti A.
AU - Cywiński, Łukasz
AU - Sham, L. J.
AU - Sanders, Gary D.
AU - Stanton, Christopher J.
AU - Munekata, Hiro
PY - 2006/8/9
Y1 - 2006/8/9
N2 - We investigate various ultrafast optical processes in ferromagnetic (III,Mn)V semiconductors induced by femtosecond laser pulses. Two-colour time-resolved magneto-optical spectroscopy has been developed, which allows us to observe a rich array of dynamical phenomena. We isolate several distinct temporal regimes in spin dynamics, interpreting the fast (<1ps) dynamics as spin heating through sp-d exchange interaction between photo-carriers and Mn ions while the ∼100ps component is interpreted as a manifestation of spin-lattice relaxation. Charge carrier and phonon dynamics were also carefully studied, showing an ultrashort charge lifetime of photo-injected electrons (∼2ps) and propagating coherent acoustic phonon wavepackets with a strongly probe energy dependent oscillation period, amplitude and damping.
AB - We investigate various ultrafast optical processes in ferromagnetic (III,Mn)V semiconductors induced by femtosecond laser pulses. Two-colour time-resolved magneto-optical spectroscopy has been developed, which allows us to observe a rich array of dynamical phenomena. We isolate several distinct temporal regimes in spin dynamics, interpreting the fast (<1ps) dynamics as spin heating through sp-d exchange interaction between photo-carriers and Mn ions while the ∼100ps component is interpreted as a manifestation of spin-lattice relaxation. Charge carrier and phonon dynamics were also carefully studied, showing an ultrashort charge lifetime of photo-injected electrons (∼2ps) and propagating coherent acoustic phonon wavepackets with a strongly probe energy dependent oscillation period, amplitude and damping.
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U2 - 10.1088/0953-8984/18/31/R01
DO - 10.1088/0953-8984/18/31/R01
M3 - Article
AN - SCOPUS:33746439951
VL - 18
SP - R501-R530
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 31
M1 - R01
ER -