Figure 3From: Room temperature spin diffusion in (110) GaAs/AlGaAs quantum wells Power-dependence spin diffusion coefficient and spin lifetime. (a) Spin diffusion coefficient D s versus pump power, i.e., spin density; the blue line is a simple fit according to τ p ∝ n ex − 0.5 . (b) Pump power-dependent spin lifetime through Kerr rotation measurement with a fixed probe power of 0.2 mW.Back to article page