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Spectroscopic Properties and Three-photon Absorption Induced Optical Limiting of Series of Novel Nonlinear Chromophores
Fu-quan Guo¤1, Xiao-lao Sun1, Hao Liang2, Zhi-yuan Hu1, Qi-jin Zhang3, Hai Ming4
1.Department of Materials Engineering, Luoyang Institute of Science and Technology, Luoyang 471023,China;2.Department of Chemical Engineering, Huizhou University, Guangdong 516007, China;3.Department of Polymer Science and Engineering, University of Science and Technology of China,Hefei 230026, China;4.Department of Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
Three novel nonlinear chromophores with symmetric D-π-D molecular structure and extended conjugated length were synthesized. Solvatochromism analysis shows great symmetric intramolecular charge transfer occurring in chromophores by the enhancement in the dipole moment between the ground and excited states. The properties of optical power limiting induced by three-photon absorption (3PA) are demonstrated. Large 3PA coefficients and the corresponding molecular cross sections as high as 10-74 cm6s2 were obtained for nanosecond laser pulses at 1.06 μm from nonlinear transmission measurements.
Key words:  Nonlinear chromophores, Solvatochromism, Three-photon absorption, Optical limiting
FundProject:国家自然科学基金
Spectroscopic Properties and Three-photon Absorption Induced Optical Limiting of Series of Novel Nonlinear Chromophores
郭福全¤1, 孙小捞1, 梁浩2, 胡治元1, 张其锦3, 明海4
1.洛阳理工学院材料工程系,洛阳471023;2.惠州学院化学工程系,惠州516007;3.中国科学技术大学高分子科学与工程系,合肥230026;4.中国科学技术大学物理系,合肥230026
摘要:
合成了三种新的具有D-π-D型分子结构和延伸共轭长度的非线性生色团,溶剂化显色分析显示由于跃迁时在基态和激发态之间有较大的偶极矩变化从而表现出较强的分子内对称电荷转移的性质.探讨了这些非线性生色团的基于三光子吸收的光限幅效应,在波长为、1064 nm的纳秒脉冲的作用下,呈现较大的三光子吸收系数,相应的生色团分子的三光子吸收截面高达10-74 cm6s2数量级.
关键词:  非线性生色团,溶剂化显色,三光子吸收,光限幅
DOI:10.1088/1674-0068/21/03/227-232
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