Chovan J, Kavousanaki E G, Perakis I E
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas and Department of Physics, University of Crete, Heraklion, Greece.
Phys Rev Lett. 2006 Feb 10;96(5):057402. doi: 10.1103/PhysRevLett.96.057402. Epub 2006 Feb 6.
We develop a theory of ultrafast light-induced magnetization dynamics in ferromagnetic semiconductors. We demonstrate magnetization control during femtosecond time scales via the interplay between nonlinear circularly polarized optical excitation, hole-spin damping, polarization dephasing, and Mn-hole-spin interactions. Our results show magnetization relaxation and precession for the duration of the optical pulse governed by the nonlinear optical polarizations and populations.
我们发展了一种关于铁磁半导体中超快光致磁化动力学的理论。我们通过非线性圆偏振光激发、空穴自旋阻尼、偏振退相以及锰-空穴自旋相互作用之间的相互作用，展示了在飞秒时间尺度上的磁化控制。我们的结果表明，在光脉冲持续时间内，磁化弛豫和进动由非线性光学偏振和粒子数决定。
