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The complex Cu2(μ-dppb)2(μ-Cl)2 has been synthesized from the reaction of CuCl, dppb and (n-Bu)4NCl. The crystal belongs to the triclinic with space group P1. The unit cell parameters are: a=9.939(4)?, b=10.083(6)?, c=14.104(5)?, α=76.46(3)°, β=71.02(2)°, γ=70.87(5)°. The single crystal X-ray diffraction analysis reveals that it has a bi-ring structure with a symmetry center at the middle of two Copper atoms. The outer ring is a 14-membered ring of Cu-dppb-Cu-dppb, and the inner ring is a 4-membered ring composed of two Cl- and two Cu(Ⅰ). Investigation of third-order optical nonlinearity shows that it exhibits considerable nonlinear absorptive and self-defocusing effect with α2=1.75×10-13m·W-1 and n2=3.19×10-18m2·W-1. CCDC: 193113. 相似文献
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基于2007-2015年我国27个省(市、自治区)的面板数据,将财政补贴与税收纳入模型,从理论上分析政府财税政策对医药制造业产业结构升级的影响,同时从产业结构高级化、结构合理化、结构生态化三个角度,测度产业结构升级水平;采用面板分位数方法分析财税政策对医药制造业产业结构升级的异质性影响。结果显示,我国医药制造业产业结构高级化、合理化、生态化存在明显的区域异质性;财政补贴明显有利于产业结构合理化和结构生态化发展,且存在明显的异质性影响,对结构高级化影响并不显著;企业所得税对整体产业结构高级化具有显著抑制影响,但随高级化水平提高,效应逐渐减弱;对产业结构生态化具有显著促进效应,而对产业结构合理化影响并不显著。文章围绕现阶段医药制造业产业升级趋势及财税政策的异质性影响,给出了相应的政策启示。 相似文献
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研究了新型富勒烯衍生物对波长 5 32nm的 8ns激光脉冲的光限幅性质 ,应用开孔Z扫描技术研究表明该衍生物的光限幅机制主要为激发态吸收 . 相似文献
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用Z扫描方法研究了富勒烯有机铬衍生物fac- and mer- [bis (1,2-diphenylphosphino) ethane] (tricarbonyl) (η2-fullerene-C60) chromium的非线性折射特性;用速率方程理论分析了激发态光学非线性材料非线性折射行为,以及大光强下高阶激发态折射度如何引起材料自散焦-自聚焦相互转化.计算出了转变光强.并数值模拟了不同光强下Z扫描实验曲线的变化过程.理论计算与实验符合得较好.
关键词:
自散焦
自聚焦
富勒烯衍生物
Z扫描 相似文献
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Nonlinear absorption at 532 nm in a cadmium texaphyrin solution has been studied using 8ns and 23ps laser pulses. The experiments show that reverse saturable absorption occurs in the nanosecond case. For picosecond pulses, RSA occurs only at low fluences, and saturable absorption occurs at high fluences. A six-level model is proposed to explain these nonlinear absorption effects. Several photophysical parameters of excited states for cadmium texaphyrin, such as absorption cross-sections at 532nm and lifetime, have been evaluated by fitting theoretical calculations with the experimental results. 相似文献
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Fresnel波带片有多个焦点,作为单色器波长选择元件使用时会受到高级衍射的影响。而Gabor波带片只有一个焦点,有更好的聚焦特性,但制作难度较大,准随机点阵二值化Gabor波带片概念的提出则解决了这个问题。介绍了准随机点阵二值化Gabor波带片的设计,并利用优化的程序分别对Fresnel波带片和准随机点阵二值化Gabor波带片的聚焦特性进行了模拟计算,通过对计算结果进行分析比较,发现准随机点阵二值化Gabor波带片具有抑制高阶衍射的特性。 相似文献
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有机分子激发态非线性吸收的瞬态特性研究 总被引:1,自引:0,他引:1
提出了一种通过测量单脉冲光的输入与输出波形来研究激发态非线性吸收的新方法,用这种方法研究了纳秒脉作用下类卟啉镉溶液与甲基橙溶液的三重激发态的非线性吸收特性,前者为反饱和吸收现象,后者是由饱和吸收转化为反饱和吸收的新现象,实验结果验证了理论模拟和正确性。 相似文献
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This paper reports the theoretical study of combining Z-scan technique with Gauss-Bessel (GB) beams beside a phase object (PO) to measure the third-order nonlinear susceptibility components.By using this method,the sign of refractive index which depends on the shape of the close aperture Z-scan curve can be easily determined.Meanwhile,the magnitude of nonlinear coefficients can also be deduced by theoretical fit.The proposed method is advantageous for high sensitivity and imposes a lower stress in the cases of fragile materials,since small pulse energy is enough for the measurement of nonlinear coefficients.Predictions of the models are compared with Gaussian Z-scan measurement and GB Z-scan measurement.By using GB beams with a PO,the sensitivity of Z-scan measurements is found to be a factor of over 60 times greater than for Gaussian beams and 2 times greater than for Gaussian-Bessel beams. 相似文献