Power-dependence spin diffusion coefficient and spin lifetime. (a) Spin diffusion coefficient Ds versus pump power, i.e., spin density; the blue line is a simple fit according to . (b) Pump power-dependent spin lifetime through Kerr rotation measurement with a fixed probe power of 0.2 mW.
Hu et al. Nanoscale Research Letters 2011 6:149 doi:10.1186/1556-276X-6-149