标题：Third-order nonlinear optical properties in [(C4H9)(4)N](2)[Cu(C3S5)(2)]-doped PMMA thin film using Z-scan technique in picosecond pulse
作者：Fan, HL;Wang, XQ;Ren, Q;Li, TB;Zhao, X;Sun, J;Zhang, GH;Xu, D;Sun, ZH;Yu, G
作者机构：[Fan, H] State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China;[ Wang, X] State Key Labo 更多
通讯作者地址：[Fan, HL]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
来源：Applied physics, A. Materials science & processing
摘要：An organometallic complex, [(C4H9)(4)N](2)[Cu(C3S5)(2)], abbreviated as BuCu, was synthesized. Then the BuCu-doped polymethylmethacrylate (PMMA) thin film with a doping concentration 1% by weight (1 wt.%) was fabricated using a spin-coating method and its third-order nonlinear optical properties were characterized using the Z-scan technique with 20 ps pulse duration at 532 and 1064 nm, respectively. The Z-scan curves have revealed that the material exhibits a self-defocusing effect at both wavelengths. Saturable absorption at 532 nm and two-photon absorption at 1064 nm were also found, respectively. Additionally, the calculated results of the material in film were compared with that of acetone solution, which indicated that the values in film were larger than that of acetone solution for about two orders in magnitude. The origins were analyzed of the difference between the two wavelengths. Our results suggest that considerable nonlinear optical properties were confirmed in BuCu-doped PMMA film. The material can easily be doped into PMMA film and forms a waveguide mode. So this material should be considered to be manufactured into devices and applied in all-optical switching, laser locking-mode, optical limiting fields etc.