Figure 5From: Photo-induced electric polarizability of Fe3O4 nanoparticles in weak optical fieldsz-Scan results for the composite. Curves for z-scans with open (circle) T(I) and closed (square) Tpv(I) apertures at radiation wavelengths of 442 nm (a) (red points, 19 W/cm2; blue points, 54 W/cm2) and 561 nm (b) (red points, 40 W/cm2; blue points, 93 W/cm2) for the composite sample (L = 2.7 mm) containing Fe3O4 nanoparticle with a 0.005% volume concentration.Back to article page