In this paper,we have synthesized the[ crystal [{Ni(mnt)_2}2][Na_2(benzo-15-crown-5)_3(H_2O)_2]and measured the nonlinear absorption coefficient of this crystal β=2.4 cm/GW. We think the mechanism of causing the nonlinear absorption is two -photon absorption.
The third order nonlinear optical refractive index and nonlinear absorption coefficient are enhanced due to the quantum confinement effects and estimated to be 4×10 -12 m 2/W and 2×10 -5 m/W respectively in nonresonant condition,while 2×10 -11 m 2/W and -1×10 -4 m/W respectively in quasi resonant condition.
By means of Z-scan, this paper supplies a description of the sensitive single_beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for the nonlinear materials. The experimental results have been given to demonstrate the application of Z-scan method.
In this paper,we have synthesized the[ crystal [{Ni(mnt)_2}2][Na_2(benzo-15-crown-5)_3(H_2O)_2]and measured the nonlinear absorption coefficient of this crystal β=2.4 cm/GW. We think the mechanism of causing the nonlinear absorption is two -photon absorption.
The third order nonlinear optical refractive index and nonlinear absorption coefficient are enhanced due to the quantum confinement effects and estimated to be 4×10 -12 m 2/W and 2×10 -5 m/W respectively in nonresonant condition,while 2×10 -11 m 2/W and -1×10 -4 m/W respectively in quasi resonant condition.
A hexagonal prism cage shaped inorganic metallic cluster compound [W2Ag4S8(PPh3)4] solution in CH2Cl2 was investigated based on the Z-scan technique using a single beam. It shows strong nonlinear absorption and self-focusing performance. Its three-order nonlinear refraction index and nonlinear absorption cofficient and three-order polarization cofficient were calculated.
By means of Z-scan, this paper supplies a description of the sensitive single_beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for the nonlinear materials. The experimental results have been given to demonstrate the application of Z-scan method.
The nonlinear absorption coefficient of an aqueous GaAs solution measured by the Z-scan technique and the nonlinear susceptibility of GaAs nanoparticles were, respectively, 0.7 × 10-9 cm W-1 and 2 × 10-9 esu at a wavelength of 795 nm.
The new nonlinear optical material comprising metal nanoparticles in a ZnO matrix exhibits the phenomenon of self-defocusing and possesses a high nonlinear absorption coefficient (β=2.07×10-3 cm/W).
The process of optical limitation in the aggregated gold hydrosol was studied, which is caused by the nonlinear absorption of the Nd : YAG laser radiation (wavelength λ = 1064 nm) with a picosecond pulse duration.
An automated setup for measuring nonlinear optical parameters (nonlinear refractive indices, third-order nonlinear susceptibilities, nonlinear absorption coefficients) of various materials by the Z-scan method has been developed.
In this paper,we have synthesized the[ crystal [{Ni(mnt)_2}2][Na_2(benzo-15-crown-5)_3(H_2O)_2]and measured the nonlinear absorption coefficient of this crystal β=2.4 cm/GW. We think the mechanism of causing the nonlinear absorption is two -photon absorption.
By means of Z-scan, this paper supplies a description of the sensitive single_beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for the nonlinear materials. The experimental results have been given to demonstrate the application of Z-scan method.
Microstructure of GaAs/SiO 2 nanogranular thin films fabricated by radio frequency magnetron co sputtering technique and postannealing are investigated via atomic force microscope,X ray diffraction,and Rutherford backscattering spectroscopy.The results show that GaAs nanocrystals with average diameters from 1 5nm to 3 2nm (depending on the annealing temperature) are uniformly dispersed in the SiO 2 matrices.GaAs and SiO 2 are found in normal stoichiometry in the films.The nonlinear optical refraction...
应用磁控共溅射技术和后退火方法制备了 Ga As/ Si O2 纳米颗粒镶嵌薄膜 ,并分别应用原子力显微镜、X射线衍射和卢瑟福背散射实验来观测薄膜的形貌、相结构和化学组分 .结果表明 Ga As纳米颗粒的平均直径很小 (约为1.5~ 3.2 nm) ,且均匀地分布于 Si O2 之中 ,薄膜中的 Ga As和 Si O2 组分都符合化学计量关系 .应用脉冲激光高斯光束对薄膜的光学非线性进行了 Z扫描测试和分析 .结果表明 ,薄膜的三阶光学非线性折射率系数和非线性吸收系数都由于量子限制效应而大大地增强 ,在非共振条件下 ,它们分别约为 4× 10 - 1 2 m2 / W和 2× 10 - 5m/ W,在准共振的条件下 ,它们分别约为 2× 10 - 1 1 m2 / W和 - 1× 10 - 4m/ W.