Effect of thickness on the optical nonlinearity of gold colloidal nanoparticles prepared by laser ablation

被引:10
|
作者
Golian, Yasaman [1 ]
Dorranian, Davoud [1 ]
机构
[1] Islamic Azad Univ, Sci & Res Branch, Plasma Phys Res Ctr, Laser Lab, Tehran, Iran
关键词
Nonlinearity; Optical properties; Z-scan; Nanoparticles; Optical limiting; Pulse broadening; Nonlinear absorption; Surface plasmon; DYE; ABSORPTION;
D O I
10.1007/s11082-013-9792-z
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The effect of thickness on the nonlinear optical properties of Au nanoparticles which produced by laser ablation of high purity gold bulk in distilled water were investigated by employing different optical techniques. Experiments were performed on the 0.3, 0.6, and 1 mm thickness cells of Au nanoparticles-fluid. The effect of nonlinear refractive index of samples on the laser beam broadening was observed. The optical limiting behavior of samples is investigated by measuring the transmitted intensity of the laser beam through the samples. The third order nonlinearity of Au nanoparticles-fluid was measured by using Z-scan data. Results show a positive second order refractive index and absorption coefficient for Au nanoparticles-fluid that are increased in due of increasing the thickness of the cells. The magnitudes of both real and imaginary parts of third order susceptibility of samples are increased by increasing the thickness.
引用
收藏
页码:809 / 819
页数:11
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