共查询到20条相似文献,搜索用时 796 毫秒
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用飞秒脉冲激光作光源,利用泵浦--探测方法测量了9个不对称五氮齿大环金属配合 物的时间分辨光克尔效应的响应信号,据此得到了它们的三阶光学非线性极化率x^(3)1111=1.19-3.38×10^-13esu和分子二阶超极化率γ1111=8.0×10^-32-2.83×10^-31esu以及光克尔效应响应不大于165fs等信息,讨论了周边取代基,中心金属离子和共轭π电子数对配合物三阶光学非线性极化率 相似文献
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导电高聚物的三阶非线性光学效应 总被引:4,自引:0,他引:4
最近,导电高聚物作为具有快速响应和大的X~(3) 的非线性光学材料的希望引超了足够的重视,这是因为它可能在快速光开关、非线性记忆和光晶体管等上获得应用.导电高聚物的三阶非线性光学系数X~(3),在10~(-9)─10~(-12)esu范围之内,并强烈地依赖于主链结构、高聚物链的构向和取向、共轭长度、取代基种类、掺杂程度和聚合条件等.所观察到的非线性光学效应是本征的,它可能与孤子、极化子和双极化子的光激发有关.本文讨论导电高聚物的三阶非线性光学效应的特性、来源、分子设计、研究进展和展望. 相似文献
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足球烯分子三阶非线性光学性质的研究 总被引:1,自引:0,他引:1
报道了有关足球烯分子甲苯溶液中简并四波混频实验.测量出足球烯C_(70)分子和C_(60)分子的三阶超极化率张量y_(1111)分量分别为1.2×10~(-30)esu和4.0×10~(-31)esu.对应于固体样品的三阶非线性光学系数X_(1111)分量分别是2.5×10~(-8)esu和8.5×10~(-9)esu.此结果表明了足球烯分子是现有的非线性光学材料中具有较大三阶非共振电子极化率材料之一.文中还利用自由电子模型解释了非线性光学极化率的起源. 相似文献
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侧链共轭的聚噻吩衍生物具有拓宽的共轭程度,有望成为一类性能优良的三阶非线性光学材料.合成了一种侧链共轭的噻吩共聚物:聚 -噻吩(POTVTh-Th),该聚合物与其均聚物相比,吸收光谱发生了明显的红移,禁带宽度为1.72eV.采用Z扫描技术在800nm下用飞秒激光器研究了该聚合物溶液和薄膜的三阶非线性光学特性,结果表明该共聚物四氢呋喃溶液中的三阶非线性极化率为8.84×10-10esu,聚合物薄膜的三阶非线性极化率为7.25×10-9esu,分别是其
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侧链共轭
噻吩共聚物
三阶非线性极化率
非线性吸收 相似文献
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An investigation is made on the optical nonlinear characteristics of MgF2 fihns containing Cu nanoparticles. When the Cu volume fraction is 0.1, at approximately εm + 2εd = 0, the film exhibits a strong thirdorder optical nonlinear refractive coefficient of 1.0×10^-9 cm2/W, a nonlinear refractive index of about -4.0×10^-7 esu, a third-order optical nonlinear response of about 6.8×10^-8s esu, and a figure of merit of about 1.0×10^-11. The result shows that the film may have potential applications in optoelectronic technology. 相似文献
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合成了一种侧链共轭的聚噻吩衍生物聚3-(5′辛基-噻吩乙烯基)噻吩(POTVTh),并通过溶液旋涂制备了聚合物薄膜.吸收光谱显示该聚合物薄膜具有较小的禁带宽度和宽的光谱响应.采用Z扫描技术在800 nm下用飞秒激光器研究了该聚合物薄膜的三阶非线性光学特性,非线性吸收系数为5.63×10-7cm/W,非线性折射率为-6.38×10-11 cm2/W,三阶非线性极化率为4.21×10-9esu,比侧链未共轭的
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聚噻吩衍生物
侧链共轭
三阶非线性极化率
非线性折射率 相似文献
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The third-order nonlinear optical properties of a series of copoly(2, 3, 5, 6-tetrafluoro-1, 4-phenylenevinylene-2, 5-dioctyloxy-1, 4-phenylenevinylene) that contain variable ratios of two differently substituted monomers have been studied in chloroform solutions at l=1064 nm by the picosecond Z-scan technique. Nonlinear refractive index n(2) of the samples investigated has been found to be negative, and a strong dependence of its magnitude on the copolymer's composition has been observed. The highest third-order nonlinear optical susceptibility, |x((3))|=(6 +/- 2)x 10(-10) esu, was measured for a copolymer obtained by reaction of equimolar quantitites of the parent monomers. 相似文献
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设计合成了7个新的噻二唑衍生物,用UV、IR1、H NMR和元素分析进行了表征。采用飞秒激光,运用简并四波混频法,研究了衍生物在非共振状态下的三阶非线性光学性能。它们的三阶非线性光学极化率χ(3)为3.75~4.18×10-13esu,非线性折射率n2为6.90~7.68×10-12esu,分子二阶超极化率γ为3.75~4.26×10-31esu,响应时间为101~115 fs。探索了衍生物的分子结构对三阶非线性光学性能的影响。引入离域能小的芳杂环,增长共轭链,形成吸供构型,增大取代基的供电子能力,提高共轭体系的共平面程度等因素有利于获得较大的三阶非线性光学性能。 相似文献
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LIANG Zhijian- WANG Shuangqing- TANG Fulong- GAN Fuxi- YU Baolong- 《Chinese Journal of Lasers》2000,9(3):233-237
1 Introduction Organicmaterialswithπelectrondelocalizationhavebeenextensivelystudiedasanimportantclassofnonlinearopticalmaterialsbecauseoftheirlargeandfastnonlinearopticalresponse[1,2].Todate,however,organometallicandcoordinationcomplexesreceivedlessatt… 相似文献
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Third-order optical nonlinearity of Ni-azo metal complex in solution was investigated by the Z-scan technique with 38 ps laser pulse excitation at 1.064 μm. Self-defocusing was observed, and third-order nonlinear susceptibility χ(3)pure and the second hyperpolarizability <γ> were measured to be 1.8×10-11 esu and 1.0×10-32 esu, respectively. 相似文献