Temperature dependence of electron spin relaxation times measured at excitation wavelength of 798 nm and optically pumped electron densities of 1.15 × 1011 cm-2. (a) The time-resolved Kerr rotation signals measured at 20, 200, and 250 K for the asymmetric GaAs QW. (b) Temperature dependence of electron spin relaxation times measured for both symmetric and asymmetric GaAs QW samples. The solid lines are drawn to guide eyes.
Han et al. Nanoscale Research Letters 2011 6:84 doi:10.1186/1556-276X-6-84