Interband dephasing and photon echo response in GaMnAs

Interband dephasing and photon echo response in GaMnAs

Coherent carrier dynamics are studied in GaMnAs using time-integrated and time-resolved four-wave mixing techniques. Dephasing is observed to be dominated by spin-flip scattering between the optically injected holes and Mn ions, revealing the rapid time scale of this scattering process in the III-Mn...

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Veröffentlicht in:Applied physics letters 2012-08, Vol.101 (6), p.62403
Hauptverfasser: Yildirim, M., March, S., Mathew, R., Gamouras, A., Liu, X., Dobrowolska, M., Furdyna, J. K., Hall, K. C.
Format: Artikel
Sprache:eng
Schlagworte:
Coherence
Dynamic tests
Four-wave mixing
Joining
Manganese
Photons
Scattering
Signatures
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Zusammenfassung:Coherent carrier dynamics are studied in GaMnAs using time-integrated and time-resolved four-wave mixing techniques. Dephasing is observed to be dominated by spin-flip scattering between the optically injected holes and Mn ions, revealing the rapid time scale of this scattering process in the III-Mn-V diluted magnetic semiconductors. The optical response is shown to exhibit the characteristic signatures of a simple photon echo, despite the complexity of band tail contributions and strong exchange coupling in this system.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4742916