Time-resolved differential reflection measurements on Ga 1-xMn xAs

Shin Kim, Eunsoon Oh, J. U. Lee, D. S. Kim, Sang Hoon Lee, J. K. Furdyna

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We measured the time-resolved differential reflectivity, ΔR, of Ga 1-xMn xAs for x ≤ 0.05 for various excitation wavelengths and compared with the signals from semi-insulating GaAs substrates. The sign of ΔR from Ga 1-xMn xAs (x = 0.015 and x = 0.03) was negative at 295 K for photon energies larger than bandgap, which was ascribed to defect-induced absorption or a reduction of exciton bleaching. We also discuss the screening of Mn alloy potential fluctuations by photocarriers in the time-resolved differential reflection of Ga 1-xMn xAs.

Original languageEnglish
Pages (from-to)1611-1614
Number of pages4
JournalJournal of the Korean Physical Society
Volume49
Issue number4
Publication statusPublished - 2006 Oct 1

Fingerprint

bleaching
screening
excitons
reflectance
defects
photons
wavelengths
excitation
energy

Keywords

  • GaMnAs
  • Pump-probe
  • Time-resolved reflectivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kim, S., Oh, E., Lee, J. U., Kim, D. S., Lee, S. H., & Furdyna, J. K. (2006). Time-resolved differential reflection measurements on Ga 1-xMn xAs. Journal of the Korean Physical Society, 49(4), 1611-1614.

Time-resolved differential reflection measurements on Ga 1-xMn xAs. / Kim, Shin; Oh, Eunsoon; Lee, J. U.; Kim, D. S.; Lee, Sang Hoon; Furdyna, J. K.

In: Journal of the Korean Physical Society, Vol. 49, No. 4, 01.10.2006, p. 1611-1614.

Research output: Contribution to journalArticle

Kim, S, Oh, E, Lee, JU, Kim, DS, Lee, SH & Furdyna, JK 2006, 'Time-resolved differential reflection measurements on Ga 1-xMn xAs', Journal of the Korean Physical Society, vol. 49, no. 4, pp. 1611-1614.
Kim, Shin ; Oh, Eunsoon ; Lee, J. U. ; Kim, D. S. ; Lee, Sang Hoon ; Furdyna, J. K. / Time-resolved differential reflection measurements on Ga 1-xMn xAs. In: Journal of the Korean Physical Society. 2006 ; Vol. 49, No. 4. pp. 1611-1614.
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