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Proceedings Paper

Femtosecond time-resolved differential reflectively measurements in Ga1-xMnxAs epitaxial thin films
Author(s): G. P. Pepe; C. de Lisio; L. Parlato; V. Pagliarulo; N. Marrocco; C. Zhao; V. Novak; K. Olejnik; M. Cukr; Roman Sobolewski
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Paper Abstract

Magnetic semiconductors such as Ga1-xMnxAs have attracted a great interest in the last years due to their high potential as advanced-performance materials in optical detection and in novel spintronic devices. The carrier dynamics and the nonlinear optical response in low-temperature-grown GaAs/Ga1-xMnxAs heterostructures represent an interesting topic much less explored than their electronic transport and/or structural studies. We report our optical investigations of Ga1-xMnxAs films, grown with different Mn concentrations and subject to annealing conditions, by time-resolved, femtosecond pump-probe, differential reflectivity measurements. The analysis of the carrier relaxation times at low temperatures is presented and discussed according to nonequilibrium theories for electron scattering in magnetic materials.

Paper Details

Date Published: 19 May 2009
PDF: 8 pages
Proc. SPIE 7354, Nonlinear Optics and Applications III, 735411 (19 May 2009); doi: 10.1117/12.823838
Show Author Affiliations
G. P. Pepe, CNR-INFM Coherentia and Univ. degli Studi di Napoli Federico II (Italy)
C. de Lisio, CNR-INFM Coherentia and Univ. degli Studi di Napoli Federico II (Italy)
L. Parlato, CNR-INFM Coherentia and Univ. degli Studi di Napoli Federico II (Italy)
V. Pagliarulo, CNR-INFM Coherentia and Univ. degli Studi di Napoli Federico II (Italy)
N. Marrocco, CNR-INFM Coherentia and Univ. degli Studi di Napoli Federico II (Italy)
C. Zhao, Univ. of Rochester (United States)
V. Novak, Institute of Physics (Czech Republic)
K. Olejnik, Institute of Physics (Czech Republic)
M. Cukr, Institute of Physics (Czech Republic)
Roman Sobolewski, Univ. of Rochester (United States)


Published in SPIE Proceedings Vol. 7354:
Nonlinear Optics and Applications III
Mario Bertolotti, Editor(s)

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