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Study of third-order nonlinear optical and all-optical switching properties of palladium metal-organic complex

机译：钯金属-有机配合物的三阶非线性光学和全光转换特性的研究

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We report the results of studies on third-order nonlinear optical properties of a newly synthesized palladium metal-organic complex [PdLPPh_3] (L = N-(2-pyridyl)-N'-(5-chlorosalicylidene)hydrazine) both in film and solution form using Z-scan and degenerate four wave mixing (DFWM) techniques. Experiments were performed using Q-switched Nd: YAG laser with nanosecond pulses at 532 nm. Investigations revealed that the palladium metal-organic complex possesses nonlinear absorption coefficient β_(eff) which is of the order of 10~(-9) m/W due to reverse saturable absorption (RSA) and negative nonlinear refractive index (self-defocusing) n_2 which is of the order of 10~9 esu. The real and imaginary parts of the third-order nonlinear optical susceptibility (x~((3))) were found to be of the order of 10~(-11) esu. The second-order hyperpolarizability (γ_n) was estimated to be of the order of 10~(-30) esu. The results of pump-probe experiments show that the switch-on and switch-off times of the palladium metal-organic complex were in us for different pump intensities and the energy dependent transmission studies reveal better limiting property of the compound at nanosecond regime. Thus the nonlinear response of the material suggests that it has a potential application for high sensitive photonic devices.
机译：我们报告了新合成的钯金属-有机配合物[PdLPPh_3]（L = N-（2-吡啶基）-N'-（5-氯水杨基）肼）的三阶非线性光学性质的研究结果。解决方案形式使用Z扫描和简并四波混合（DFWM）技术。使用Q开关Nd：YAG激光器在532 nm处进行纳秒级脉冲进行实验。研究表明，由于反向饱和吸收（RSA）和负非线性折射率（自散焦），钯金属-有机络合物的非线性吸收系数β_（eff）约为10〜（-9）m / W。 n_2大约为10〜9 esu。发现三阶非线性光学磁化率（x〜（（3）））的实部和虚部约为10〜（-11）esu。二阶超极化率（γ_n）估计约为10〜（-30）esu。泵浦探针实验的结果表明，在不同的泵浦强度下，钯金属-有机络合物的接通和关断时间在我们体内，并且能量依赖的传输研究揭示了该化合物在纳秒范围内的更好的限制性质。因此，材料的非线性响应表明它在高灵敏度光子器件中具有潜在的应用。

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