Proceedings Paper
Control of coherent magnetization precession in GaMnAs by ultrafast optical excitation| Format | Member Price | Non-Member Price |
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Paper Abstract
We report comprehensive temperature and photoexcitation intensity dependent studies of the photoinduced
magnetization precession in Ga1-xMnxAs (x = 0.035) by time-resolved Kerr rotation measurements. We observe coherent
oscillations of local Mn spins triggered by an ultrafast photo-induced reorientation of the easy axis due to changes in the
magnetic anisotropy. The amplitude saturation of these oscillations above certain pump intensity is indicative of
stabilization of the magnetic easy axis orientation on temperatures above ~Tc/2. We find that the observed magnetization
precession damping (Gilbert damping) is strongly dependent on pump laser intensity, but largely independent of ambient
temperature.
Paper Details
Date Published: 4 January 2008
PDF: 5 pages
Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68390J (4 January 2008); doi: 10.1117/12.755487
Published in SPIE Proceedings Vol. 6839:
Nonlinear Optics: Technologies and Applications
Yiping Cui; Qihuang Gong; Yuen-Ron Shen, Editor(s)
PDF: 5 pages
Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68390J (4 January 2008); doi: 10.1117/12.755487
Show Author Affiliations
J. Qi, Vanderbilt Univ. (United States)
Y. Xu, Vanderbilt Univ. (United States)
X. Liu, Univ. of Notre Dame (United States)
Y. Xu, Vanderbilt Univ. (United States)
X. Liu, Univ. of Notre Dame (United States)
J. K. Furdyna, Univ. of Notre Dame (United States)
I. E. Perakis, Univ. of Crete (Greece)
N. Tolk, Vanderbilt Univ. (United States)
I. E. Perakis, Univ. of Crete (Greece)
N. Tolk, Vanderbilt Univ. (United States)
Published in SPIE Proceedings Vol. 6839:
Nonlinear Optics: Technologies and Applications
Yiping Cui; Qihuang Gong; Yuen-Ron Shen, Editor(s)
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