Citation: CHEN Jing-Wei, WANG Xin-Qiang, REN Quan, LI Ting-Bin, YANG Hong-Liang, ZHANG Jing-Nan, LI Guo-Chao. Third Order Nonlinear Optical Properties of Benzyltriethylamine Bis(2-thioxo-1,3-dithiole-4,5-dithiolato) Aurate(III)[J]. Acta Physico-Chimica Sinica, 2011, 27(03): 717-721. doi: 10.3866/PKU.WHXB20110340
(苄基三乙基铵)双(1,3-二硫杂环戊烯-2-硫酮-4,5-二硫基)-金的三阶非线性光学性质
合成了一种新的配位化合物(苄基三乙基铵)双(1,3-二硫杂环戊烯-2-硫酮-4,5-二硫基)-金(BTEAADT). 利用旋涂技术制备了该材料与聚甲基丙烯酸甲酯(PMMA)掺杂的复合薄膜, 该材料在复合薄膜中的质量分数为1%. 采用Z扫描方法, 分别测试了该材料的乙腈溶液和该材料与PMMA复合薄膜在波长为1064 nm, 脉宽为20 ps条件下的三阶非线性光学特性. 同时还研究了复合薄膜的线性光学性质. Z扫描的结果表明, 复合薄膜和该材料的乙腈溶液都具有自散焦效应, 非线性折射率都是负值. 在实验条件下, 两者的非线性吸收效应都是可以忽略的. 经过计算得出溶液样品的非线性折射率为-1.459×10-18 m2·W-1, 复合薄膜样品的非线性折射率为-3.978×10-15 m2·W-1. 该材料在1064 nm处的非线性光学器件方面有潜在应用价值.
English
Third Order Nonlinear Optical Properties of Benzyltriethylamine Bis(2-thioxo-1,3-dithiole-4,5-dithiolato) Aurate(III)
We prepared a new crystalline nonlinear optical coordination compound, benzyltriethylamine bis (2-thioxo-1,3-dithiole-4,5-dithiolato) aurate(III) (BTEAADT). A BTEAADT-doped poly(methyl methacrylate) (PMMA) thin film with a mass fraction of 1% was prepared by spin-coating. The third-order nonlinear optical properties of BTEAADT in acetonitrile and a BTEAADT-doped PMMA film were investigated using the laser Z-scan technique with 20 ps pulses at 1064 nm. The linear optical properties of the polymer thin film were also studied. The Z-scan spectra revealed that the polymer thin film sample possessed negative nonlinear refraction and exhibited a similar self-defocusing effect to that found for the solution. In addition, nonlinear absorption was negligible for both systems under the experimental conditions used. The nonlinear refractive index was calculated to be -1.459×10-18 m2·W-1 for the solution sample and -3.978×10-15 m2·W-1 for the film. These results suggest that this material is a promising candidate for application in nonlinear optical devices such as all-optical switching manufacture at 1064 nm.
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Key words:
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Nonlinear optical property
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