Terahertz dynamics of photogenerated carriers in ferromagnetic InGaMnAs

Authors :: Khodaparast, G.A.
Larrabee, D.C.
Kono, J.
King, J.
Kato, J.
Slupinski, T
Oiwa, A
Sanders, G.D
Munekata, H.
Stnaton, C.J.
Source :: Journal of Applied Physics. May 15, 2003, Vol. 93 Issue 10, p8286, 3 p.
Publication Year :: 2003
Abstract: The picosecond transient carrier response of InGaMnAs/InP was measured by two-color pump-probes spectroscopy, using an intense near-infrared beam as the pump and a 52.5 mu m (5.7 terahertz (THz)) beam as the probe. The calculations indicate that the nonexponential decays may be due to carrier dynamics associated with GAMMA-L intervalley scattering that becomes efficient when ferromagnetism modifies the band structure.