Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs

M. Bhowmick, T. R. Merritt, G. A. Khodaparast*, Bruce W. Wessels, Stephen A. McGill, D. Saha, X. Pan, G. D. Sanders, C. J. Stanton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. In addition, we found that the sign of the differential transmission changed as a function of probe wavelength. The electronic structure for InMnAs was calculated for B=0, using an eight-band k•p model, which includes conduction and valence band mixing as well as coupling of electrons and holes to the magnetic Mn impurities. This allows us to explain some of the carrier dynamics and the sign changes in the differential transmission.

Original languageEnglish (US)
Article number125313
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number12
DOIs
StatePublished - Mar 27 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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