Ultra-fast nonlinear optical properties and photophysical mechanism of a novel pyrene derivative

被引:0
|
作者
Zhang, Youwei [1 ]
Yang, Junyi [1 ]
Xiao, Zhengguo [2 ]
Song, Yinglin [1 ,2 ]
机构
[1] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China
[2] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
来源
HIGH POWER LASERS, HIGH ENERGY LASERS, AND SILICON-BASED PHOTONIC INTEGRATION | 2016年 / 10152卷
关键词
Pyrene derivative; z-scan; pump-probe; optical nonlinearity; PHASE OBJECT;
D O I
10.1117/12.2246194
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 third-order nonlinear optical properties of 1-(pyrene-1-y1)-3-(3-methylthiophene) acrylic keton named PMTAK was investigated by using Z-scan technique. The light sources for picoseconds(ps) and femtosecond(fs) Z-scan were a mode-locked Nd: YAG laser (21 ps, 532 nm, 10 Hz) and an Yb: KGW based fiber laser (190 fs, 515 nm, 532 nm, 20 Hz), respectively. In the two cases, reverse saturation absorption(RSA) are observed. The dynamics of the sample's optical nonlinearity is discussed via the femtosecond time-resolved pump probe with phase object at 515nm. We believe that the molecules in excited state of particle population count is caused by two-photon absorption(TPA). The five-level theoretical model is used to analysis the optical nonlinear mechanism. Combining with the result of picosecond Z-scan experiment, a set of optical nonlinear parameters are calculated out. The femtosecond Z-scan experiment is taken to confirm these parameters. The obvious excited-state nonlinearity is found by the set of parameters. The result shows that the sample has good optical nonlinearity which indicates it has potential applications in nonlinear optics field.
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页数:6
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