Optical nonlinearity of Bi2O3 nanoparticles studied by Z-scan technique

Abstract
The third-order optical nonlinear susceptibilities of Bi 2 O 3 nanoparticlescoated by a layer of stearic acid in toluene sol and bare in hydrosol were measured by the Z -scan technique. The nonlinear susceptibility of the coated Bi 2 O 3 nanoparticles was found to be two orders of magnitude greater than that of the bulk Bi 2 O 3 . For the coated Bi 2 O 3 nanoparticles, the figures of merit related to linear loss and two-photon absorption were determined.