19 October 2016 Ultra-fast nonlinear optical properties and photophysical mechanism of a novel pyrene derivative
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Proceedings Volume 10152, High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration; 101520N (2016) https://doi.org/10.1117/12.2246194
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
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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Youwei Zhang, Junyi Yang, Zhengguo Xiao, Yinglin Song, "Ultra-fast nonlinear optical properties and photophysical mechanism of a novel pyrene derivative", Proc. SPIE 10152, High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration, 101520N (19 October 2016); doi: 10.1117/12.2246194; https://doi.org/10.1117/12.2246194
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