Author/Authors :
Qu، نويسنده , , Shiliang and Du، نويسنده , , Chimin and Song، نويسنده , , Yinglin and Wang، نويسنده , , Yuxiao and Gao، نويسنده , , Yachen and Liu، نويسنده , , Shutian and Li، نويسنده , , Yuliang and Zhu، نويسنده , , Daoben، نويسنده ,
Abstract :
Optical nonlinearities of gold nanoparticles protected by ligands have been investigated by Z-scan technique. Absorptive and refractive optical limiting (OL) effects have been measured with 8 ns duration laser pulses at 532 nm. Significant differences have been found experimentally for these two nanoparticles that differ only by their ligands. Such differences indicate that nonlinear optical responses in two nanocomposites are strongly influenced by the surface plasmon resonance of gold nanoparticles and also the nature of ligands. Both of these two nanocomposites show stronger refractive optical limiting effects than C60 in toluene.
