Abstract:

The ability to manipulate the relaxation of spin population is a key step toward building a practical spintronics devices in semiconductor 2D structures. The spin-orbit coupling, which is controllable via the structural engineering or electrical field, is the main source of spin relaxation via DP spin relaxation mechanism. We will present our recent experimental results on the spin dynamics of electrons in GaAs/AlGaAs 2D structures by time-resolved Kerr rotation. The possibility of optical control of SO coupling will be also discussed in (001)-orientation 2DEG. Finally we will show the preliminary results on spin diffusion process by the transient spin grating technique in (110)QWs, in which the longer spin relaxation (~1ns) is observed at room temperature.
 
 
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