Ultrafast magneto-optics in ferromagnetic III-V semiconductors

Jigang Wang; Chanjuan Sun; Yusuke Hashimoto; Junichiro Kono; Giti A. Khodaparast; Łukasz Cywiński; L. J. Sham; Gary D. Sanders; Christopher J. Stanton; Hiro Munekata

doi:10.1088/0953-8984/18/31/R01

Ultrafast magneto-optics in ferromagnetic III-V semiconductors

Jigang Wang, Chanjuan Sun, Yusuke Hashimoto, Junichiro Kono, Giti A. Khodaparast, Łukasz Cywiński, L. J. Sham, Gary D. Sanders, Christopher J. Stanton, Hiro Munekata

Research output: Contribution to journal › Article

84 Citations (Scopus)

Abstract

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.

Original language	English
Article number	R01
Pages (from-to)	R501-R530
Journal	Journal of Physics Condensed Matter
Volume	18
Issue number	31
DOIs	https://doi.org/10.1088/0953-8984/18/31/R01
Publication status	Published - 2006 Aug 9
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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Wang, J., Sun, C., Hashimoto, Y., Kono, J., Khodaparast, G. A., Cywiński, Ł., Sham, L. J., Sanders, G. D., Stanton, C. J., & Munekata, H. (2006). Ultrafast magneto-optics in ferromagnetic III-V semiconductors. Journal of Physics Condensed Matter, 18(31), R501-R530. [R01]. https://doi.org/10.1088/0953-8984/18/31/R01

Ultrafast magneto-optics in ferromagnetic III-V semiconductors. / Wang, Jigang; Sun, Chanjuan; Hashimoto, Yusuke; Kono, Junichiro; Khodaparast, Giti A.; Cywiński, Łukasz; Sham, L. J.; Sanders, Gary D.; Stanton, Christopher J.; Munekata, Hiro.

In: Journal of Physics Condensed Matter, Vol. 18, No. 31, R01, 09.08.2006, p. R501-R530.

Research output: Contribution to journal › Article

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abstract = "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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AU - Cywiński, Łukasz

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AU - Sanders, Gary D.

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AU - Munekata, Hiro

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